@YourMomsMomsGrandma No idea. Since we aren't a YouTube partner, there's no way to appeal the restriction, either. A case of random YouTube 'justice'.
@ballardjones Actually, if it's pure hydrogen, the match goes out for the same reason why the match goes out with pure nitrogen - there's no oxygen to sustain the fire. Now, if you have a mixture of hydrogen and oxygen, that's a completely different story. Do it with large enough amounts and you have a shuttle launch.
@okmankk Looks like one has to be a partner in order to ask for an appeal of an age restriction ruling. Since we are not a partner, looks like we are out of luck. I'd still like to know what someone found objectionable. Still, the whole thing seems unreasonable to me.
Obviously someone found learning to be objectionable. Probably on the flimsy justification that fire is dangerous. Good thing we don't let children do anything dangerous, like say riding around 30 at a time on top of gallons of fuel in fast moving metal boxes with no seat belt. >.>
1. People can be distressingly stupid. Like mayfly dumb. See #2, however.
2. That's doubtful, probably an automated system, like how the big corps manage to get millions of videos blocked for copyright. I had one blocked in under a minute. There were no humans involved.
3. YouTube doesn't understand fair use or anything else of social value. Natural consequence of the "my house my rules" notion of rights. Like how we ended up with a de facto national dress code for employment.
@sammy3212321 Igneous is a term used to describe how a rock formed. It's used to describe rock that forms directly from molten material. Doesn't really apply to water.
Also, oxygen isn't flammable. It supports burning but, technically, doesn't itself burn. Note that the fire went out once the match was consumed, although there was still oxygen in the test tube. If the oxygen itself was burning, it would have kept going until the oxygen ran out.
@sammy3212321 Yes, if you had hydrogen gas and oxygen gas, then the hydrogen would be the fuel and the oxygen would be the oxidizer. Pure hydrogen, just by itself, won't burn. If you like, you can consider water to be burnt hydrogen, or hydrogen ash.
That is the best explanation for why water won't burn I've ever heard. But isn't it true that at sufficiently high temperature water is flammable or explosive, beyond flash boiling and other steam effects I mean?
I remember being told that there were certain kinds of exotic material fires that could not be extinguished with water because they burn so hot the water splits, not merely because they produce their own oxidizers (like thermite.) At what temperature does this occur?
@Innomen It's my understanding that that is the sort of thing that happened to a couple of the reactors in Japan after the earthquake/tsunami. They had hydrogen explosions caused by the dissociation of the water due to the heat from the core. Again, the water itself wasn't flammable, but it broke down into something that was (that, ironically, made water again as it exploded). Don't know at what temperature this occurs, though.
@sammy3212321, qualities of chemical compounds are not an average combination of the qualities of their elements. For example, sodium is a metal that reacts violently with water, and chlorine is a toxic gas, but salt is neither of these things.
@music47jazz Liquid oxygen is far more worrisome than liquid nitrogen. We had to bring in people from the Safety Division and our Fire Safety Engineer before using liquid oxygen. Add to that the fact that we had to produce the liquid oxygen we were using - we don't have any liquid oxygen on-site - and you wind-up with a situation where you really can't waste any.
Solid rocket motors actually consume quite a bit of oxygen, it's just bound in the the ammonium perchlorate. The propellant for the space shuttle solid rockets is ~70% ammonium perchlorate by mass, and oxygen makes up slightly more than 50% of ammonium perchlorate by mass, meaning oxygen comprises about 38% of the total propellant mass. And since each rocket motor carries 1.1 million pounds of propellant fully loaded, that works out to quite a lot of oxygen!
@LoveClassicMusic0205 We used the liquid nitrogen to (a) condense it out of the air and to (b) condense it from small oxygen bottles used for home brazing. We detail it somewhat in the video called "Liquid Nitrogen vs. Liquid Oxygen: Behind the Scenes".
@Clod15 t depends on the amounts of nitrogen and oxygen in the mix. If it's ~79% nitrogen and ~21% oxygen, you end up with something like normal air and the match should burn normally, at least in the part of the test tube that's filled with gas. A higher concentration of nitrogen makes the match burn worse and a higher concentration of oxygen makes the match burn better. The two test tubes in this video show the extremes (one mostly nitrogen and the other mostly oxygen).
@mitchell2617 It depends on the type of rocket. A solid rocket motor, like the two boosters used on the space shuttle, use exactly zero liquid oxygen. The shuttle's main engines, which use liquid oxygen and liquid hydrogen, consume more than 500,000 liters of liquid oxygen during launch.
@murlove7 Yes, among other things. The space shuttle's main engines use liquid oxygen and liquid hydrogen. That's what's stored in the big, orange tank the shuttle is attached to. The two solid rocket boosters, which are attached to the main tank, burn a mixture of ammonium perchlorate and aluminum.
@Guitar0wner The liquid oxygen? No, but it didn't need to be. It was condensed from the air rather than from an oxygen tank. Worked well enough for what we needed.
It also looks like a very brief condensation of CO2 on the walls of the test tube right above the flames when the match was dropped in the liquid oxygen.
a piece of lithium will continue to burn in the nitrogen atmosphere and so will some other metals. Magnesium will burn in a CO2 atmosphere. So it is not always the case that you need oxygen for something to burn.
@nickcorn93 Yes, there are exceptions. Titanium will also burn in a pure nitrogen environment. By and large, though, removing a fire's supply of oxygen will usually extinguish it.
@JeffersonLab Lithium and Magnesium both produce their own oxygen when they burn, though. So they still have a source of oxygen despite being in a oxygen deprived environment.
@NohbdyThere How is that possible? That sounds like the chemist's version of the perpetual motion machine. I can see how magnesium burns in a carbon dioxide atmosphere (2Mg + CO2 --> 2MgO + C), but this isn't producing oxygen.
@nickcorn93 Right! Back in the 70's a VW warehouse burned to the slab because the transmission cases were made out of magnesium. You can imagine what happened when they hit the fire with water and CO2! They ended up bringing special foam from the nearby airport but it was too late. I still don't understand why the local FD didn't call for foam first or the warehouse wasn't equipped for a magnesium fire. -- low bid...
@JeffersonLab Some people just don't understand, do they? Thermite anyone? How about making liquid CO2 in a soda bottle? If you are very careful it can be done.
@askyurself It depends on how much liquid oxygen is mixed in. Make it a mix of 78% nitrogen and 21% oxygen (and 1% argon) and you essentially have normal air.
@JeffersonLab I suspect that it probably would still put out the flame until most or all of the nitrogen had evaporated. Since the boiling point of oxygen is a bit lower than nitrogen most of the gas would be nitrogen.
@wb5rue Other way around, actually. Oxygen's boiling point is a bit above nitrogen's boiling point. That's why we were able to produce the liquid oxygen we were using.
@Roflcopterlolwtf 'Air' is actually a mix of different gases. Gaseous oxygen is slightly denser than gaseous nitrogen (both at room temperature) and liquid oxygen is quite a bit denser than liquid nitrogen. So, in air, a sample of pure oxygen is denser than a 79% nitrogen 21% oxygen mix.
It's a neat experiment, but it doesn't bother explaining the -why- of the whole thing.
It'd be a better educational video if you explained why the fire burns better in oxygen than in natural air. It's a perfect opportunity to talk about incomplete combustion and the fire triangle that you let by.
@hack451 So the whole part where Joanna says "Fire needs three things to burn. It needs fuel, heat and oxygen. Because there's no oxygen in our test tube, the fire goes out. No oxygen, no fire!" doesn't count as explaining the fire triangle? Granted, she doesn't say the words "fire triangle" but the concept is there, right?
@JeffersonLab i think the part that's missing is talk DURING the oxygen bit. I don't know too many people who actively think of matches as fuel- so even knowing the fire triangle fairly well i actually got a little confused when it didn't go out in the oxygen, too. i had to think about it for a moment before realizing that - oh yeah. match=technically fuel.
@IKickedurassdontcry Well... yes and no. The advantage of burning something in a pure oxygen environment is that you get complete combustion. You'll note that there's no ash or residue from the match we burn. So, you'll get more energy out of it than you would by burning a match in normal air, but it isn't like this is 'extra' energy. It's just a more efficient conversion process. Plus, it burns faster, so the energy gets produced in a shorter amount of time.
@hruting490 Liquid oxygen (O2) isn't ozone (O3). The point I was trying to make was that, since liquid oxygen is a fluid, it can be inhaled just like any other fluid. But, just because something can be done doesn't mean that it should be done. Liquid oxygen has a number of hazards that will happily kill you if you were to decide to dump it into your lungs.
@hruting490 Ozone is an oxidizer. It can damage organic molecules because one of the oxygen comes lose and combines with the H or S or C of your organic molecules.
@ooystein Is this for real? Music in the quiet spaces? You mean that deathly long 15 second gap at one point where no one is talking? We're suppose to whip out a banjo or something at that point? Really?
@BlackValleyRequiem These are very scripted. We don't have a lot of free time in which to do these (this isn't our 'official' job) and scripting them helps to speed things along. We're working on being more natural. This is one of our earlier videos, too. Hopefully, we've improved over time.
@4x4forlyfe That causes a mini explosion because there's a mix of hydrogen and oxygen at the opening of the test tube. If it were really pure hydrogen (no oxygen at all), there would be no fire and no explosion.
heyy what created our molecular cloud to form our solar system??if a star?what type?and woulnt it have burnt it's fuel and -?gas?- of fussion??does pass throught the process of fission aswell??
Well, as far as element synthesis is concerned, the hydrogen and most of the helium and lithium was formed within the first few minutes after the Big Bang. Heavier elements are created within stars and elements above iron are created in supernovae explosions. The molecular cloud our solar system formed from would have been created from a combination of these sources.
Yes, it can. The oxygen we had was boiling, so it's temperature was -361.82˚F (-218.79°C). If you want to freeze it, you need to lower its temperature to -297.31°F (-182.95°C).
@TechnologyR0xx0rz Wow. Yeah. Whoops! Got those flipped around. Oxygen boils at -297.31°F (-182.95°C) and freezes at -361.82˚F (-218.79°C). Sorry about that and nice catch!
what happens if i put hydrogen only, in any form (solid, liquid or gas if it exist in all three states...) at a test tube and put fire with it? and the other question i want you to answer is: how does the Sun keep on burning out there in the space if it needs oxygen for any kind of fire to burn??? and where can i get these materials (like liquid nitrogen, for example) to do homemade experiments? (with an professional helping me out of course)
#1 - A fire in a pure hydrogen environment goes out due to a lack of oxygen.
#2 - The sun isn't burning like a fire burns. The sun gets its power from nuclear fusion. The temperatures and pressures in the sun's core are so high it converts hydrogen to helium. It's a nuclear process, not a chemical process like burning.
#3 - Try looking in the Yellow Pages under 'welding' or 'welding supplies.' Companies that sell gases to welders tend to carry liquid nitrogen.
So if you tried to put the match out with water (the one in the liquid oxygen) it wouldn't go out right? Because it has heat, air, and fuel right? Or is that totally wrong?
There's no water here. I think you mean the liquid that's in the liquid oxygen test tube. If you do, that liquid is liquid oxygen. We more or less tried to use it to put the match out when we dropped the match in. As you said, it had heat, fuel and (lots of) oxygen, so the fire kept on burning.
Nice, nitrogen gas is used in some fire suppression systems at high tech companies, that way the equipment won't get doused with water. Would be a different story with liquid oxygen...
The liquid oxygen is at its boiling point, so any energy it takes in goes to changing it from a liquid to a gas. The only things it can really get energy from are the test tube and the air. You'll see it boils quickly when Joanna first pours it into the test tube. It then slows down as the test tube gets cold. There also isn't a whole lot of energy content in a given parcel of air, so it's hard for it to get energy that way. It stays as a liquid because it isn't taking in energy that quickly.
Ok, and also, one thing that I never dould understand is how can something with a temerature that is below zero boil? Is it just for a few second while it comes in contact with something that is warmer than the Liquid Nitrogen or oxygen?
I think the problem is that people are used to dealing with water, so you end up with phrases like 'boiling hot.' Ignoring the more detailed chemistry definition, boiling basically means that something is changing from a liquid to a gas. Different materials do this at different temperatures. Things that are 'normally' gases (oxygen, nitrogen, etc...) are already above their boiling point. If they weren't they would be liquids or solids.
Oxygen supports combustion, but it isn't an explosive material. The only fuel that was available inside the test tube was the matchstick. Once that was exhausted, there was nothing left to burn, so the fire went out, even though there was still plenty of oxygen left.
@Daa155It was some sort of liquid substitute that contains oxygen (not sure what it's called) and there is actually researcher into using such a substance for diver. But actual liquid oxygen is far to cold for such purposes.
Not with liquid oxygen. It is far too cold to inhale and survive, especially in a liquid form. I have seen where some sort of oxygenated liquid is 'breathed'. It's intended for deep sea divers... don't know if it's being actively used now or not. Maybe that's what they were (pretending?) to use in the movie? Whatever it was, what you are describing is impossible to do with liquid oxygen.
There is a device called a 'cryogenic rebreather' that uses liquid oxygen, but the user doesn't directly 'inhale' the oxygen in its liquid form. It needs to be warmed first in order to protect the user from freezing their lungs.
Liquid nitrogen is colder than liquid oxygen, but not by much. Under standard atmospheric pressure, boiling liquid nitrogen is 77 Kelvin while boiling liquid oxygen is 90 Kelvin. On the Fahrenheit scale, thats a difference of about 24 degrees.
I went to Jefferson Lab last year for the Science Bowl. Pretty cool stuff there. I saw most of the experiments they do in these videos. I saw the liquid nitrogen and ring test in the same room they do it in the video. I think it might have been the same guy too (as in Steve). I live in Gloucester, VA. Nice job with the videos. Keep them coming.
There's not enough surface area. Whats dangerous is when liquid oxygen get in closed environment, heats up and expands explosively. Liquids don't burn unless very specific calculations are made, their fumes do.
the oxygen supports the oxidation of the match stick, when it is placed in a higher concentration of oxygen gas, the rxn speeds up due to higher concentration.
Other than the sound of Steve overacting his 'Fire?!' line, I'm not hearing anything unusual. Although, I suppose there isn't anything unusual about Steve overacting his lines...
BTW, I said that there was liquid oxygen in Joanna's test tube. She, of course, had liquid nitrogen.
Okay, I hear it now. It sounds a bit like a fly buzzing right before Joanna says 'Yeah.' I don't know what that is. The room where we are isn't in a very quiet area. It could be noise from the hallway leaking in or something from outside (there's a window about 15 feet to the left). Or, it could just be an audio glitch. Whatever it is, it isn't intentional.
That would basically create liquid air. You could freeze water with it if you had enough of it, but it wouldn't create frozen water. Water molecules are made by joining one atom of oxygen to two atoms of hydrogen. You can't make water if all you have is oxygen and nitrogen.
Nitrogen gas is about 80% of the air we breathe (not liquid nitrogen - that would be bad). The test tube that Joanna had was nearly 100% nitrogen. The flame went out because there wasn't any oxygen in her test tube - the other 20% of the air. (Roughly speaking, normal air is 80% nitrogen and 20% oxygen.)
This was addressed in an earlier comment. I've tried to post the text here, but the system won't let me. Basically, depending on how you mixed the two, you would get something between pure nitrogen (no flame) and pure oxygen (lots of flame).
So does liquid oxygen work in a similar way to liquid nitrogen? What I mean is, if I put something like a banana in a tub of liquid oxygen, would it freeze and become hard so I could smash it off the floor?
Yes. Liquid nitrogen is only slightly colder than liquid oxygen. If you froze one banana in liquid nitrogen and another banana in liquid oxygen, they would be equally frozen.
Yes, but even here you need to be a little careful. The gas can still be cold enough to hurt you and, if you are trying it with something like liquid nitrogen, there might not be enough oxygen mixed in for you to stay conscious or alive. This wasn't really a concern for us because we were using such small amounts, but it does become an issue when dealing with larger amounts.
In some of them, yes. Dry chemical extinguishers (the 'normal' kind with the narrow hose) are pressurized with nitrogen gas and that's what forces the chemical agent out of the extinguisher. The chemical agent is the main fire fighting material. Using compressed nitrogen is a better choice than using compressed air since it doesn't add any oxygen to the fire.
Extinguishers that use compressed CO2 are also common. Those don't use any other agent and don't make a mess when they are used.
We made our own using liquid nitrogen. We don't use liquid oxygen at the Lab and it wasn't worth buying a Dewar for the amount we were going to use. You can see the set-up we used in the 'Behind the Scenes' video. I tried adding a link to it but, when I do, the comment doesn't get posted...
It also doesn't always alert me when new comments are posted since I just stumbled across yours while replying to a comment (which was posted after yours) which I had been notified about. Still some bugs in the system, I guess.
It depends on how much of each you are mixing. The more liquid nitrogen you add, the less intensely the fire will burn. You know what happens with pure nitrogen and you know what happens with pure oxygen. Mixing the two puts you somewhere in between. If you combine 80% nitrogen and 20% oxygen, you almost have regular air and the fire would burn more or less normally.
#1would it be a good idea to place an injector nozzle in the air intake hose before the throttle body on an combustion engine and feed it with liquid oxy?
#2and what about the same idea combined with dry nos shot?
#3would injecting liquid oxy and fuel(replacing normal intake system) in the engine improve anything?
The idea is to burn all the available fuel during the power stroke. If the engine is already doing that, adding more oxygen won't help. It would burn the fuel earlier in the power stroke and then do nothing the rest of the time (assuming the enriched oxygen environment didn't start consuming the inside of the cylinder itself). What it would let you do is burn more fuel. Burning more fuel in the power stroke = more power.
Au contraire. Replacing the air in the combustion cycle with LOX would prevent the creation of nitrogen oxides. Excess oxygen would prevent the creation of carbon monoxide. See? It's just a hard way of accomplishing the same thing as a catalytic converter.
why is this age restricted?
YourMomsMomsGrandma 4 months ago
@YourMomsMomsGrandma No idea. Since we aren't a YouTube partner, there's no way to appeal the restriction, either. A case of random YouTube 'justice'.
JeffersonLab 4 months ago
if you put a match into liquid hydrogen it explodes into flames
ballardjones 5 months ago
@ballardjones Actually, if it's pure hydrogen, the match goes out for the same reason why the match goes out with pure nitrogen - there's no oxygen to sustain the fire. Now, if you have a mixture of hydrogen and oxygen, that's a completely different story. Do it with large enough amounts and you have a shuttle launch.
JeffersonLab 5 months ago 2
its funny as a kid you think its any liquid that puts out fire when its just the lack of oxygen in the liquid
zeldafan1515 5 months ago
how is this video age restricted? i mean seriously its just science!
okmankk 6 months ago 2
@okmankk No idea. It's nothing that we've done. We'll investigate, but YouTube isn't exactly known for its great customer support...
JeffersonLab 6 months ago
@okmankk Looks like one has to be a partner in order to ask for an appeal of an age restriction ruling. Since we are not a partner, looks like we are out of luck. I'd still like to know what someone found objectionable. Still, the whole thing seems unreasonable to me.
JeffersonLab 6 months ago
@JeffersonLab
Obviously someone found learning to be objectionable. Probably on the flimsy justification that fire is dangerous. Good thing we don't let children do anything dangerous, like say riding around 30 at a time on top of gallons of fuel in fast moving metal boxes with no seat belt. >.>
Innomen 6 months ago
@Innomen The things that annoy me are:
(1) Someone objected to this simple demo
(2) Someone at YouTube actually -agreed- that it's inappropriate
(3) YouTube's wisdom is infallible, so an appeals process isn't necessary, at least not for a mere non-partner
JeffersonLab 6 months ago
@JeffersonLab
1. People can be distressingly stupid. Like mayfly dumb. See #2, however.
2. That's doubtful, probably an automated system, like how the big corps manage to get millions of videos blocked for copyright. I had one blocked in under a minute. There were no humans involved.
3. YouTube doesn't understand fair use or anything else of social value. Natural consequence of the "my house my rules" notion of rights. Like how we ended up with a de facto national dress code for employment.
Innomen 6 months ago
mix kerosene and liquid oxygen... just kidding.
spotlightman1234 6 months ago
That reminds me, how come water isn't igneous?
I mean, oxygen and hydrogen are both flammable...
sammy3212321 10 months ago
@sammy3212321 Igneous is a term used to describe how a rock formed. It's used to describe rock that forms directly from molten material. Doesn't really apply to water.
Also, oxygen isn't flammable. It supports burning but, technically, doesn't itself burn. Note that the fire went out once the match was consumed, although there was still oxygen in the test tube. If the oxygen itself was burning, it would have kept going until the oxygen ran out.
JeffersonLab 10 months ago
@JeffersonLab but then the hydrogen would still act as a fuel
sammy3212321 10 months ago
@sammy3212321 Yes, if you had hydrogen gas and oxygen gas, then the hydrogen would be the fuel and the oxygen would be the oxidizer. Pure hydrogen, just by itself, won't burn. If you like, you can consider water to be burnt hydrogen, or hydrogen ash.
JeffersonLab 10 months ago
@JeffersonLab ohhh, i see.
thanks!
sammy3212321 10 months ago
@JeffersonLab
That is the best explanation for why water won't burn I've ever heard. But isn't it true that at sufficiently high temperature water is flammable or explosive, beyond flash boiling and other steam effects I mean?
I remember being told that there were certain kinds of exotic material fires that could not be extinguished with water because they burn so hot the water splits, not merely because they produce their own oxidizers (like thermite.) At what temperature does this occur?
Innomen 6 months ago
@Innomen It's my understanding that that is the sort of thing that happened to a couple of the reactors in Japan after the earthquake/tsunami. They had hydrogen explosions caused by the dissociation of the water due to the heat from the core. Again, the water itself wasn't flammable, but it broke down into something that was (that, ironically, made water again as it exploded). Don't know at what temperature this occurs, though.
JeffersonLab 6 months ago
@sammy3212321, qualities of chemical compounds are not an average combination of the qualities of their elements. For example, sodium is a metal that reacts violently with water, and chlorine is a toxic gas, but salt is neither of these things.
Dauntless07 6 months ago
but why you didn't waste any oxygen for the first time?
music47jazz 10 months ago
@music47jazz Liquid oxygen is far more worrisome than liquid nitrogen. We had to bring in people from the Safety Division and our Fire Safety Engineer before using liquid oxygen. Add to that the fact that we had to produce the liquid oxygen we were using - we don't have any liquid oxygen on-site - and you wind-up with a situation where you really can't waste any.
JeffersonLab 10 months ago
@michalchik Yes! Those are awesome!
JeffersonLab 11 months ago
Why does that noise happen when you put it in the testube?
DHdrizzle 11 months ago
@DHdrizzle Because the test tube is hot relative to the liquid, so it boils. The sound of the liquid boiling is mainly what you're hearing.
JeffersonLab 11 months ago
Solid rocket motors actually consume quite a bit of oxygen, it's just bound in the the ammonium perchlorate. The propellant for the space shuttle solid rockets is ~70% ammonium perchlorate by mass, and oxygen makes up slightly more than 50% of ammonium perchlorate by mass, meaning oxygen comprises about 38% of the total propellant mass. And since each rocket motor carries 1.1 million pounds of propellant fully loaded, that works out to quite a lot of oxygen!
monomalo2007 11 months ago
How did you make your liquid oxygen?
LoveClassicMusic0205 1 year ago
@LoveClassicMusic0205 We used the liquid nitrogen to (a) condense it out of the air and to (b) condense it from small oxygen bottles used for home brazing. We detail it somewhat in the video called "Liquid Nitrogen vs. Liquid Oxygen: Behind the Scenes".
JeffersonLab 1 year ago
What happens if u mix Liquid nitrogen and Liquid Oxygen together and then put a match inside?! :D doooo it. i like these videos there GREAT!
Clod15 1 year ago
@Clod15 t depends on the amounts of nitrogen and oxygen in the mix. If it's ~79% nitrogen and ~21% oxygen, you end up with something like normal air and the match should burn normally, at least in the part of the test tube that's filled with gas. A higher concentration of nitrogen makes the match burn worse and a higher concentration of oxygen makes the match burn better. The two test tubes in this video show the extremes (one mostly nitrogen and the other mostly oxygen).
JeffersonLab 1 year ago
@murlove7 Yes but only a tiny amount of the stuff
mitchell2617 1 year ago
@mitchell2617 It depends on the type of rocket. A solid rocket motor, like the two boosters used on the space shuttle, use exactly zero liquid oxygen. The shuttle's main engines, which use liquid oxygen and liquid hydrogen, consume more than 500,000 liters of liquid oxygen during launch.
JeffersonLab 1 year ago
@murlove7 Yes, among other things. The space shuttle's main engines use liquid oxygen and liquid hydrogen. That's what's stored in the big, orange tank the shuttle is attached to. The two solid rocket boosters, which are attached to the main tank, burn a mixture of ammonium perchlorate and aluminum.
JeffersonLab 1 year ago
not very pure
Guitar0wner 1 year ago
@Guitar0wner The liquid oxygen? No, but it didn't need to be. It was condensed from the air rather than from an oxygen tank. Worked well enough for what we needed.
JeffersonLab 1 year ago
i like when joanna holds up the fire extinguisher, lol
labmaster49 1 year ago
It also looks like a very brief condensation of CO2 on the walls of the test tube right above the flames when the match was dropped in the liquid oxygen.
you guys have too much fun!
wb5rue 1 year ago
@wb5rue That, or maybe condensed water vapor. Burning a nice hydrocarbon matchstick should produce lots of CO2 and H2O.
JeffersonLab 1 year ago
@JeffersonLab Yep, as I thought right after I hit send, "or it could just be water vapor...: ;)
wb5rue 1 year ago
a piece of lithium will continue to burn in the nitrogen atmosphere and so will some other metals. Magnesium will burn in a CO2 atmosphere. So it is not always the case that you need oxygen for something to burn.
nickcorn93 1 year ago
@nickcorn93 Yes, there are exceptions. Titanium will also burn in a pure nitrogen environment. By and large, though, removing a fire's supply of oxygen will usually extinguish it.
JeffersonLab 1 year ago
@JeffersonLab Lithium and Magnesium both produce their own oxygen when they burn, though. So they still have a source of oxygen despite being in a oxygen deprived environment.
NohbdyThere 1 year ago
@NohbdyThere How is that possible? That sounds like the chemist's version of the perpetual motion machine. I can see how magnesium burns in a carbon dioxide atmosphere (2Mg + CO2 --> 2MgO + C), but this isn't producing oxygen.
JeffersonLab 1 year ago
@JeffersonLab I must have been misinformed, I was told that lithium and magnesium gave off oxygen as it burned. Oh well, live and learn.
NohbdyThere 1 year ago
@nickcorn93 Right! Back in the 70's a VW warehouse burned to the slab because the transmission cases were made out of magnesium. You can imagine what happened when they hit the fire with water and CO2! They ended up bringing special foam from the nearby airport but it was too late. I still don't understand why the local FD didn't call for foam first or the warehouse wasn't equipped for a magnesium fire. -- low bid...
wb5rue 1 year ago
lol why so happy xD
TheMrSilverdude 1 year ago
@TheMrSilverdude Because it's fire! With liquid oxygen! What's not to be happy about!
JeffersonLab 1 year ago
@JeffersonLab Some people just don't understand, do they? Thermite anyone? How about making liquid CO2 in a soda bottle? If you are very careful it can be done.
wb5rue 1 year ago
so then.. no oxygen, no fire.. liquid nitrogen is, uhh, nitrogen.. what if liquid oxygen is mixed with it?... will it still burn?..
askyurself 1 year ago
@askyurself It depends on how much liquid oxygen is mixed in. Make it a mix of 78% nitrogen and 21% oxygen (and 1% argon) and you essentially have normal air.
JeffersonLab 1 year ago
@JeffersonLab I suspect that it probably would still put out the flame until most or all of the nitrogen had evaporated. Since the boiling point of oxygen is a bit lower than nitrogen most of the gas would be nitrogen.
wb5rue 1 year ago
@wb5rue Other way around, actually. Oxygen's boiling point is a bit above nitrogen's boiling point. That's why we were able to produce the liquid oxygen we were using.
JeffersonLab 1 year ago
@JeffersonLab right! I had that bwarackd.
wb5rue 7 months ago
Are you sure it's a good ideia? hua hua hua LOL KABUM!!!!
epinatel 1 year ago
NO OXYGEN, NO FIRE, REALLY?!!?!?!!!?!!??!?
Zolga00 1 year ago
@Zolga00 YES!!!! REALLY!!!!!
JeffersonLab 1 year ago
I thought that Oxygen was denser than air because it's Mr, which is 32, is higher than the Mr of air which is 29?
Roflcopterlolwtf 1 year ago
@Roflcopterlolwtf 'Air' is actually a mix of different gases. Gaseous oxygen is slightly denser than gaseous nitrogen (both at room temperature) and liquid oxygen is quite a bit denser than liquid nitrogen. So, in air, a sample of pure oxygen is denser than a 79% nitrogen 21% oxygen mix.
JeffersonLab 1 year ago
oxygen go boom nitrogen go out
phenixking300 1 year ago
It's a neat experiment, but it doesn't bother explaining the -why- of the whole thing.
It'd be a better educational video if you explained why the fire burns better in oxygen than in natural air. It's a perfect opportunity to talk about incomplete combustion and the fire triangle that you let by.
hack451 1 year ago
@hack451 So the whole part where Joanna says "Fire needs three things to burn. It needs fuel, heat and oxygen. Because there's no oxygen in our test tube, the fire goes out. No oxygen, no fire!" doesn't count as explaining the fire triangle? Granted, she doesn't say the words "fire triangle" but the concept is there, right?
JeffersonLab 1 year ago
@JeffersonLab i think the part that's missing is talk DURING the oxygen bit. I don't know too many people who actively think of matches as fuel- so even knowing the fire triangle fairly well i actually got a little confused when it didn't go out in the oxygen, too. i had to think about it for a moment before realizing that - oh yeah. match=technically fuel.
Occoris 1 year ago
I have a question, is talcum powder (baby powder) harmful?
SandwichLadyOfLEAF 1 year ago
@SandwichLadyOfLEAF It's put on babies, so it can be but so bad, right? Looks like the only real problem it poses is if it's inhaled.
JeffersonLab 1 year ago
You guys make science really interesting! :D
SandwichLadyOfLEAF 1 year ago
wait wait wait if you burn somthin in lox will it give a whole lot more heat as well?
IKickedurassdontcry 1 year ago
@IKickedurassdontcry Well... yes and no. The advantage of burning something in a pure oxygen environment is that you get complete combustion. You'll note that there's no ash or residue from the match we burn. So, you'll get more energy out of it than you would by burning a match in normal air, but it isn't like this is 'extra' energy. It's just a more efficient conversion process. Plus, it burns faster, so the energy gets produced in a shorter amount of time.
JeffersonLab 1 year ago
Well I enjoy'd the video. :) 5* rating from me!
idoeverythingwrong 1 year ago
can you breath in liquid oxygen?
plushieboy1234 1 year ago
@plushieboy1234 In the same sort of way that you can drink gasoline. It's physically possible, but not necessarily a survivable situation.
JeffersonLab 1 year ago
@plushieboy1234 well you cant breathe in the ozone, wich is actually 3 oxygen atoms bound together, i think the same goes with this...
hruting490 1 year ago
@hruting490 Liquid oxygen (O2) isn't ozone (O3). The point I was trying to make was that, since liquid oxygen is a fluid, it can be inhaled just like any other fluid. But, just because something can be done doesn't mean that it should be done. Liquid oxygen has a number of hazards that will happily kill you if you were to decide to dump it into your lungs.
JeffersonLab 1 year ago
@hruting490 Ozone is an oxidizer. It can damage organic molecules because one of the oxygen comes lose and combines with the H or S or C of your organic molecules.
vmelkon 1 year ago
i love the color of liquid oxygen.....beautiful
TheArmo1 1 year ago
Liquid oxygen is like steroids to fire lol
Prototypepwns1998 1 year ago
Lighting liquid oxygen sounds a lot like sugar and molten potassium chlorate.
itsmanofpopsicle 1 year ago
@itsmanofpopsicle Sort of, except that we don't actually light the liquid oxygen. Oxygen doesn't burn. It just supports combustion.
JeffersonLab 1 year ago
Good. This was boring. Pleas put some music in the quiet spaces!
ooystein 1 year ago
@ooystein Is this for real? Music in the quiet spaces? You mean that deathly long 15 second gap at one point where no one is talking? We're suppose to whip out a banjo or something at that point? Really?
JeffersonLab 1 year ago 11
@JeffersonLab Lmao. Banjos rule. xD
NEXT VIDEO.
FREEZING A BANJO WITH LIQUID NITROGEN.
Fireblademorningstar 1 year ago
Cool experiment. Thanks for uploading!
Collserra 1 year ago
nice............. but too scripted
01DarkKnight01 1 year ago
It sounds a bit tooo scripted>.> but good job lol
BlackValleyRequiem 1 year ago
@BlackValleyRequiem These are very scripted. We don't have a lot of free time in which to do these (this isn't our 'official' job) and scripting them helps to speed things along. We're working on being more natural. This is one of our earlier videos, too. Hopefully, we've improved over time.
JeffersonLab 1 year ago
LMAO! 1:55
bunnyman135 1 year ago
What about the whole concept of the 'hydrogen pop test'??
4x4forlyfe 1 year ago
@4x4forlyfe That causes a mini explosion because there's a mix of hydrogen and oxygen at the opening of the test tube. If it were really pure hydrogen (no oxygen at all), there would be no fire and no explosion.
JeffersonLab 1 year ago
heyy what created our molecular cloud to form our solar system??if a star?what type?and woulnt it have burnt it's fuel and -?gas?- of fussion??does pass throught the process of fission aswell??
psychobillylx 1 year ago
Well, as far as element synthesis is concerned, the hydrogen and most of the helium and lithium was formed within the first few minutes after the Big Bang. Heavier elements are created within stars and elements above iron are created in supernovae explosions. The molecular cloud our solar system formed from would have been created from a combination of these sources.
JeffersonLab 1 year ago
Yes, it can. The oxygen we had was boiling, so it's temperature was -361.82˚F (-218.79°C). If you want to freeze it, you need to lower its temperature to -297.31°F (-182.95°C).
JeffersonLab 1 year ago
@JeffersonLab I think you might have mixed up the figures. Shouldn't freezing point be at lower temperature than boiling point? Yours is opposite.
TechnologyR0xx0rz 1 year ago
@TechnologyR0xx0rz Wow. Yeah. Whoops! Got those flipped around. Oxygen boils at -297.31°F (-182.95°C) and freezes at -361.82˚F (-218.79°C). Sorry about that and nice catch!
JeffersonLab 1 year ago
what happens if i put hydrogen only, in any form (solid, liquid or gas if it exist in all three states...) at a test tube and put fire with it? and the other question i want you to answer is: how does the Sun keep on burning out there in the space if it needs oxygen for any kind of fire to burn??? and where can i get these materials (like liquid nitrogen, for example) to do homemade experiments? (with an professional helping me out of course)
misawaalexandre 1 year ago
#1 - A fire in a pure hydrogen environment goes out due to a lack of oxygen.
#2 - The sun isn't burning like a fire burns. The sun gets its power from nuclear fusion. The temperatures and pressures in the sun's core are so high it converts hydrogen to helium. It's a nuclear process, not a chemical process like burning.
#3 - Try looking in the Yellow Pages under 'welding' or 'welding supplies.' Companies that sell gases to welders tend to carry liquid nitrogen.
Good luck!
JeffersonLab 1 year ago
So if you tried to put the match out with water (the one in the liquid oxygen) it wouldn't go out right? Because it has heat, air, and fuel right? Or is that totally wrong?
sssssbooom 1 year ago
There's no water here. I think you mean the liquid that's in the liquid oxygen test tube. If you do, that liquid is liquid oxygen. We more or less tried to use it to put the match out when we dropped the match in. As you said, it had heat, fuel and (lots of) oxygen, so the fire kept on burning.
JeffersonLab 1 year ago
Thanks, I didn't phrase my question right, but you still answered it for me. Thanks again.
sssssbooom 1 year ago
Not a problem. Have a good one!
JeffersonLab 1 year ago
could you mix liquid oxygen and thermite? id like to see that!
comodo24 1 year ago 6
Yikes!
JeffersonLab 1 year ago
Nice, nitrogen gas is used in some fire suppression systems at high tech companies, that way the equipment won't get doused with water. Would be a different story with liquid oxygen...
Valicore 1 year ago
way cool!!!!
MaxC17 2 years ago
So, how does the oxygen just not evaporate into regualr air? like how does it stay in liquid form?
progamer11092 2 years ago
The liquid oxygen is at its boiling point, so any energy it takes in goes to changing it from a liquid to a gas. The only things it can really get energy from are the test tube and the air. You'll see it boils quickly when Joanna first pours it into the test tube. It then slows down as the test tube gets cold. There also isn't a whole lot of energy content in a given parcel of air, so it's hard for it to get energy that way. It stays as a liquid because it isn't taking in energy that quickly.
JeffersonLab 2 years ago
Ok, and also, one thing that I never dould understand is how can something with a temerature that is below zero boil? Is it just for a few second while it comes in contact with something that is warmer than the Liquid Nitrogen or oxygen?
progamer11092 2 years ago
I think the problem is that people are used to dealing with water, so you end up with phrases like 'boiling hot.' Ignoring the more detailed chemistry definition, boiling basically means that something is changing from a liquid to a gas. Different materials do this at different temperatures. Things that are 'normally' gases (oxygen, nitrogen, etc...) are already above their boiling point. If they weren't they would be liquids or solids.
JeffersonLab 2 years ago
why did the oxygen not explode?
wellwisher106 2 years ago
Oxygen supports combustion, but it isn't an explosive material. The only fuel that was available inside the test tube was the matchstick. Once that was exhausted, there was nothing left to burn, so the fire went out, even though there was still plenty of oxygen left.
JeffersonLab 2 years ago
wait wasn't there something about liquid oxygen in like a movie? where a diver had to breathe that?
Daa155 2 years ago
@Daa155It was some sort of liquid substitute that contains oxygen (not sure what it's called) and there is actually researcher into using such a substance for diver. But actual liquid oxygen is far to cold for such purposes.
dragonridley 1 year ago
i saw in a movie once it showed that its possible to breath liq oxi
now i know its only a movie but is it in any way true?
adirm18 2 years ago
Not with liquid oxygen. It is far too cold to inhale and survive, especially in a liquid form. I have seen where some sort of oxygenated liquid is 'breathed'. It's intended for deep sea divers... don't know if it's being actively used now or not. Maybe that's what they were (pretending?) to use in the movie? Whatever it was, what you are describing is impossible to do with liquid oxygen.
JeffersonLab 2 years ago
There is a device called a 'cryogenic rebreather' that uses liquid oxygen, but the user doesn't directly 'inhale' the oxygen in its liquid form. It needs to be warmed first in order to protect the user from freezing their lungs.
JeffersonLab 2 years ago
can u plz tell me that which is cooler i mean liquid nitrogen or liquid oxygen?
akhil1996kc 2 years ago
Liquid nitrogen is colder than liquid oxygen, but not by much. Under standard atmospheric pressure, boiling liquid nitrogen is 77 Kelvin while boiling liquid oxygen is 90 Kelvin. On the Fahrenheit scale, thats a difference of about 24 degrees.
JeffersonLab 2 years ago
nitrogen is capable of getting to much colder deg
but there are much cooler things to do with oxi since it burns
adirm18 2 years ago
YAWN.
METAL1ON 2 years ago
I went to Jefferson Lab last year for the Science Bowl. Pretty cool stuff there. I saw most of the experiments they do in these videos. I saw the liquid nitrogen and ring test in the same room they do it in the video. I think it might have been the same guy too (as in Steve). I live in Gloucester, VA. Nice job with the videos. Keep them coming.
Evanator22742 2 years ago
I bet they never take the goggles off
dudeyourvideosucks 2 years ago 16
We do, when it's appropriate. Check out our Van de Graaff/static electricity videos... no goggles there!
JeffersonLab 2 years ago
you should try boiling hot water with liquid nitrogen :D
RoIIand 2 years ago
We are actually planning something along those lines.
JeffersonLab 2 years ago
well nobody want's their corneas hurt don't they?
javislayers 2 years ago
Nope. Eyes are good.
JeffersonLab 2 years ago
Getting lit up . . . about SCIENCE!!!
otakursed 2 years ago
So liquid oxygen dont burn? Only the gas?
olesto 2 years ago
There's not enough surface area. Whats dangerous is when liquid oxygen get in closed environment, heats up and expands explosively. Liquids don't burn unless very specific calculations are made, their fumes do.
dalailama83 2 years ago
it does burn, but its to viscous to burn just as liquid
JoeJones3001 2 years ago
@olesto
both the gaseous and the liquid oxygen don't burn!! through oxygen the combustion of another inflammable substance is maintained.
19rsa 2 years ago
the oxygen supports the oxidation of the match stick, when it is placed in a higher concentration of oxygen gas, the rxn speeds up due to higher concentration.
102938475653 2 years ago
1:42 and 1:55 = LOL. Great job guys, keep up the cool videos.
SneijderEto109 2 years ago
lol, you sounded like... "oh god im gunna die"
TheChaoticMystic 2 years ago
whoa the heat of LOX incineartes the match cool
MScrub1 2 years ago
Lots of available oxygen = complete combustion
JeffersonLab 2 years ago
Whats that sound at 00:20?
Ironfistconsumerist 2 years ago
At 00:20, Joanna is saying 'Yeah'. At about 00:26, you get the sound of the liquid oxygen boiling as it touches a warmer part of the test tube.
JeffersonLab 2 years ago
its right before she says 'yeah'. it sounds like a growl or something.
Ironfistconsumerist 2 years ago
Other than the sound of Steve overacting his 'Fire?!' line, I'm not hearing anything unusual. Although, I suppose there isn't anything unusual about Steve overacting his lines...
BTW, I said that there was liquid oxygen in Joanna's test tube. She, of course, had liquid nitrogen.
JeffersonLab 2 years ago
turn the sound up it continues when Joanna is saying 'Yeah' and sounds like an owl hooting mixed with a grrr but its really quiet
RichardULZ 2 years ago
Okay, I hear it now. It sounds a bit like a fly buzzing right before Joanna says 'Yeah.' I don't know what that is. The room where we are isn't in a very quiet area. It could be noise from the hallway leaking in or something from outside (there's a window about 15 feet to the left). Or, it could just be an audio glitch. Whatever it is, it isn't intentional.
JeffersonLab 2 years ago
you guys are awesome
Arttoee129 2 years ago
If i combined a liquid oxygen and liquid nitrogen, what would I create? Could I make frozen water with those ingredients?
cherrybombs8 2 years ago
That would basically create liquid air. You could freeze water with it if you had enough of it, but it wouldn't create frozen water. Water molecules are made by joining one atom of oxygen to two atoms of hydrogen. You can't make water if all you have is oxygen and nitrogen.
JeffersonLab 2 years ago
liquid nitrogen is also 80% that we air we breath right? so it has oxygen why the fire is dead?
fheythe 2 years ago
Nitrogen gas is about 80% of the air we breathe (not liquid nitrogen - that would be bad). The test tube that Joanna had was nearly 100% nitrogen. The flame went out because there wasn't any oxygen in her test tube - the other 20% of the air. (Roughly speaking, normal air is 80% nitrogen and 20% oxygen.)
JeffersonLab 2 years ago
what would hapen if you mixed the two
carmenlee87 2 years ago
This was addressed in an earlier comment. I've tried to post the text here, but the system won't let me. Basically, depending on how you mixed the two, you would get something between pure nitrogen (no flame) and pure oxygen (lots of flame).
JeffersonLab 2 years ago
can you breath liquid oxygen?
vulture97 2 years ago
It wouldn't be a great idea. It's nearly as cold as liquid nitrogen and would quickly freeze whatever parts of your body it comes into contact with.
JeffersonLab 2 years ago
So does liquid oxygen work in a similar way to liquid nitrogen? What I mean is, if I put something like a banana in a tub of liquid oxygen, would it freeze and become hard so I could smash it off the floor?
deil321 2 years ago
Yes. Liquid nitrogen is only slightly colder than liquid oxygen. If you froze one banana in liquid nitrogen and another banana in liquid oxygen, they would be equally frozen.
JeffersonLab 2 years ago
lol well you cant breathe it but you can breath the vapors that come off it when it becomes a gas :P
ghostrider122333 2 years ago
Yes, but even here you need to be a little careful. The gas can still be cold enough to hurt you and, if you are trying it with something like liquid nitrogen, there might not be enough oxygen mixed in for you to stay conscious or alive. This wasn't really a concern for us because we were using such small amounts, but it does become an issue when dealing with larger amounts.
JeffersonLab 2 years ago
do they put nitrogen in fire extenquishers?
vulture97 2 years ago
In some of them, yes. Dry chemical extinguishers (the 'normal' kind with the narrow hose) are pressurized with nitrogen gas and that's what forces the chemical agent out of the extinguisher. The chemical agent is the main fire fighting material. Using compressed nitrogen is a better choice than using compressed air since it doesn't add any oxygen to the fire.
Extinguishers that use compressed CO2 are also common. Those don't use any other agent and don't make a mess when they are used.
JeffersonLab 2 years ago
where do u get liquid oxygen? or can u make your own with liquid nitrogen?
santa22622 2 years ago
We made our own using liquid nitrogen. We don't use liquid oxygen at the Lab and it wasn't worth buying a Dewar for the amount we were going to use. You can see the set-up we used in the 'Behind the Scenes' video. I tried adding a link to it but, when I do, the comment doesn't get posted...
JeffersonLab 2 years ago
It don't allow people to post links in comments.
santa22622 2 years ago
How annoying...
It also doesn't always alert me when new comments are posted since I just stumbled across yours while replying to a comment (which was posted after yours) which I had been notified about. Still some bugs in the system, I guess.
JeffersonLab 2 years ago
also like i said before you should make a video showing your process on making liquid oxygen.
santa22622 2 years ago
lol
these guys are funny
MemoElOtro 2 years ago
lol its magama D: run awaiii
XshlomoX 2 years ago
1:55....
SniperSupport 2 years ago
She mentioned you need oxygen for a fire but really you only need an oxidizer. For a fire from combustion yes you need oxygen
johnsmith777710 2 years ago
Yup. If you have enough O inside your fuel, it can burn without needing O2 from outside.
Drag0nfoxx 2 years ago
That's isss so COOL!
Everlastingxoxo 2 years ago
wt happens when u add them both
2getther?
flaminco666 2 years ago
It depends on how much of each you are mixing. The more liquid nitrogen you add, the less intensely the fire will burn. You know what happens with pure nitrogen and you know what happens with pure oxygen. Mixing the two puts you somewhere in between. If you combine 80% nitrogen and 20% oxygen, you almost have regular air and the fire would burn more or less normally.
JeffersonLab 2 years ago
that nevrous lapther was cheesy
and if you had a big can of liquid ox
then you could have a big fire
and then that little fire extinsher is not going to do anthing
otherwis pretty cool
bestSVMS 2 years ago
Cheesy??? That there was some high quality acting, bub. :-)
JeffersonLab 2 years ago
cheasy but hq acting
=D
bestSVMS 2 years ago
#1would it be a good idea to place an injector nozzle in the air intake hose before the throttle body on an combustion engine and feed it with liquid oxy?
#2and what about the same idea combined with dry nos shot?
#3would injecting liquid oxy and fuel(replacing normal intake system) in the engine improve anything?
robbedoes1985 3 years ago
The idea is to burn all the available fuel during the power stroke. If the engine is already doing that, adding more oxygen won't help. It would burn the fuel earlier in the power stroke and then do nothing the rest of the time (assuming the enriched oxygen environment didn't start consuming the inside of the cylinder itself). What it would let you do is burn more fuel. Burning more fuel in the power stroke = more power.
JeffersonLab 3 years ago
Au contraire. Replacing the air in the combustion cycle with LOX would prevent the creation of nitrogen oxides. Excess oxygen would prevent the creation of carbon monoxide. See? It's just a hard way of accomplishing the same thing as a catalytic converter.
romancavalrysword 2 years ago
sweet :)
spyroglitcher 3 years ago