Isnt that dangerous? Wouldnt you be eating liquid nitrogen or would it just boil off and just turn the milk substance cold enough to turn into ice cream like you just did?
@aj7cool7 Yeah, you don't eat it unless the nitrogen has completely boiled away -and- if it's still soft enough to scoop. It's possible to cool it so much that it becomes dangerous, but it'll be too frozen to scoop if it is.
@Jeffersonlab, thanks! lol ps my science teacher showed ur videos to us. i wanna go to ur lab for a feild trip but im not even sure thats possible...anyway, thanks! (:
hullo. when im older i wunna work at jefferson lab. right now im only 11 but still knoe for a fact i wunna work there. how old would i have to be? where are u guys located? and how do i sign up?
@jcullom You have to be at least 16 to work here. Jefferson Lab is located in Newport News, Virginia. When the time is right, you can apply for a position via our website. Good luck and thanks for watching!
A couple of questions. Where is Jefferson Labs? In 2 years I will turn 16 and would love to work there, Will you allow anyone with scientific knowledge to work there? And finally, How much does a gallon of liquid nitrogen cost? Please answer to them all. Thank you.
@superfrenchfrys Jefferson Lab is in Newport News, Virginia. While we do hire students 16 and older to work at the Lab, there is an application process. For us, liquid nitrogen costs about $1 a gallon.
@JeffersonLab I thought I recognized the name Jefferson Lab... do you guys go to middle schools or do presentations for them? I'm pretty sure I saw you guys somewhere a few years back when I was in middle school. I'm in Chesapeake.
@AngryLlamaAttack If the nitrogen plant's compressors are functioning properly, there shouldn't be any residue. The worst thing that could happen is that some oil works its way into the nitrogen. That oil would be left behind as the nitrogen boils off. That wouldn't be great.
Nitrogen has no aftertaste. Nitrogen doesn't have taste. If it did, you'd be tasting it all the time since 78% of the air is nitrogen.
awww... at the end you should have not told them that its made with liquid nitrogen and the in the middle of eating it you would say "its made with liquid nitrogen!"! that'd be so hilarious!
@Weapon283 If it's a small enough drop, it won't do any damage. But, since we can't really control the amount that might accidentally get on us, we wear gloves!
@EvilMyselfFTW It just boils away to nothing when exposed to room temperature. By the time 'clean-up' would come to mind, there's nothing left to clean up.
@JustAnAllycat Because we run a superconductive electron accelerator and liquid nitrogen is a nice, inexpensive way to cool helium to 77 K. We actually need helium at 2.2 K, but one must start somewhere.
@russianbeast23 We get liquid nitrogen from the Test Lab fill station. We don't make it here at the Lab. We have a contract with an industrial supplier.
@JeffersonLab how come the sugar and milk and wtv didnt freeze when you poured liquid nitrogen?? Why when you pour it on the table it doesnt freeze?? if thats the case why wear gloves?? can i throw liquid nitrogen onto your face?? what would happen....serious ?'s please answer them all please
@MrChannel5news 1. Not enough nitrogen was added to make it freeze. Put an ice cube in a swimming pool and no one notices a temperature drop. Put an iceberg in and it's a different story.
2. The table is frozen. It's a solid.
3. Things get cold. Nitrogen splashes. The possibility of getting hurt exists.
@diginut96 No, but there was no liquid nitrogen on it when we ate it. The nitrogen cooled the ice cream as it boiled off. Once it boiled away, then we ate it. Since it was still soft enough to scoop, we knew that it wasn't cold enough to be dangerous.
@JeffersonLab Steve! (I think it is) ur just like Simon Lane from the yogscast (BlueXephos) he loves blowing up stuff in minecraft and you like putting liquid nitrogen on things!
@TheDarthVaderJed Yes. That's why we're eating it at the end. Realize that the nitrogen's long gone. It did its job of cooling the ice cream mixture. It would be a very bad idea to eat it if the liquid nitrogen were still in it.
I tried making ice cream using dry ice, the result is not the same with using liquid nitrogen. It's not good. It tasted carbonated. What's the reason for this?
@TheSweetalchemist There's a lot of water in the ice cream mix and carbon dioxide is soluble in water. Once it's in there, some of the carbon dioxide reacts with water to form carbonic acid. So, yeah, I guess you could say you carbonated it.
@percussionist624 For the most part, yes. One person is a student intern so, technically, she wasn't a Lab employee. Everyone else is. Or, at least, was at the time of the filming.
first of all i like liquid nitrogen icecream better than real icecream because it tastes so much sweeter to me but im pratically eating a science experiment
@2010fatimae It's not too expensive for us, but we buy it in volume. The Lab pays on the order of $1 per gallon. It's also plenty easy for us to find since it's all over the place here. For you, you would check your nearest welding supply store. Check the Yellow Pages for 'welding supply.' But, make sure you have the proper equipment and knowledge to safely handle/use liquid nitrogen. It can hurt/kill you if you don't know what you're doing.
@zppbonzo No, as demonstrated by us eating the ice cream at the end of the video!
The colder the ice cream is, the more difficult it is to scoop. If it's dangerously cold, it's too brick-like to do much of anything with. If it's easily scooped, it's not too cold.
That is an interesting way. However, I don't think my household owns liquid nitrogen. I guess perhaps water isn't the only part of matter that can become solid, liquid and gas.
Sence the nirogen boild at -195.75 in celcius will in boil in antartica under and coldest winter or will the ice, humidity or something else there prevent it from doing that?
@ahmeeeeeeeeeeeed If you dump liquid nitrogen on the ground during the coldest night in Antarctica, the liquid nitrogen will quickly boil away. It's nowhere near cold enough there to keep nitrogen as a liquid without using an insulated container. If it were, the Earth's atmosphere would condense out during the Antarctic winter.
@rexdragon89 Nitrogen isn't actively dangerous. 78% of the air is nitrogen and we get along with it just fine. The problem becomes when there is a lack of oxygen. Breathing a pure nitrogen atmosphere will kill you, but not because of the nitrogen. The nitrogen won't do anything to you. It won't do anything for you, either. It's the lack of oxygen that's an issue.
@Almontmarine The liquid nitrogen is more of a means to an end. What we really need is liquid helium at 2.2 K. Liquid nitrogen is a convenient way to inexpensively cool the helium to 77 K. It's the other 74.2 K worth of temperature drop that's tricky.
@JosiahChristian123 (cont) ...are loose. If liquid nitrogen gets in or goes through them, they are easily and quickly removed with a flick of the wrist. I have personally been doing pubic liquid nitrogen demonstrations for 19 years. I've probably 'spilled' something like 2,000 gallons of nitrogen. I think I've had to ditch my gloves once. I have frozen bits of myself with the nitrogen exactly twice. Both times, I -wasn't- wearing my gloves. I don't think that's a coincidence.
@JosiahChristian123 (cont) ...protect you from the liquid for a few moments. But, when you use liquid nitrogen, it typically makes -other- things cold, too. Touch a piece of cold metal without a glove and there won't be anything to protect you. The LE depends on the gas layer produced by the vaporization of the liquid. Other, cold items won't do that. So, the gloves are a must. "But what if the liquid nitrogen gets in your gloves?!" I hear you exclaim. That's why the gloves we wear... (cont)
@JosiahChristian123 Keep in mind that we have years and years of experience using liquid nitrogen, so we know how to spill liquid nitrogen 'everywhere' safely. While it may appear that we are being careless with the liquid nitrogen, that isn't the case.
As far as the gloves are concerned... they are appropriate safety gear. Some people have the misconception that you are better off not wearing gloves when handling liquid nitrogen. This isn't the case. Sure, the Leidenfrost effect will... (cont)
I would appreciate any help finding information on designing an exhaust system for liquid nitrogen vapor. I cannot find any information on velocity in ductwork, duct materials, type of insulation, type/material for exhaust fan that can handle the low temperatures, etc. If you know of any resources, I thank you in advance.
@TheSweetalchemist All I can tell you is what the DOE's rules are for this. Personally, I think what they are doing in those other videos is irresponsible, but that's between them and their insurance company.
@TheSweetalchemist Assume LN2 expands by a factor of 1,000 when it changes to a gas (it's actually less that, but it gives us a safety factor). That means one liter of LN2 makes 1 cubic meter of N2. Find the volume of the room and then use this equation:
@JeffersonLab Well, actually, 19.5% is when the ODH alarms sound. The calculation must result in an oxygen percentage greater that 19.5%, not greater than or equal to 19.5%.
@TheSweetalchemist Well, that's even worse then. The room's only 56 m^3, which is less than the gas equivalent of the liquid nitrogen. If you have a 180 liter Dewar in the room, that's the potential spill you have to worry about. It could fill your room three times over with nitrogen gas. Not what you want to deal with and wouldn't be allowed here.
Three liters of liquid would be allowed under our rules. A spill that size would only reduce the oxygen content to 19.9%.
@TheSweetalchemist The easiest solution is to not store/use the 180 liter Dewar in that room. Keep it outside, draw the three liters you want and bring that into the room.
@TheSweetalchemist The 'smoke' is condensed water vapor. How much you see is dependent more on how humid it is rather than how much nitrogen is spilt. But, yes, liquid nitrogen can cause an oxygen deficiency hazard. But, we know the volume of the room and how much liquid nitrogen expands when it boils, so we can calculate how much liquid nitrogen is safe to bring into a particular area. That's a 10 liter tank (that wasn't even full). The room we were in is rated for 20 liters.
@TheSweetalchemist Drinking liquid nitrogen certainly wouldn't be a great thing, but no one in this video drank liquid nitrogen. The nitrogen was used to cool/freeze the mixture. Doing so caused the liquid nitrogen to boil away. There was no liquid nitrogen in the final product.
Spilling too much liquid nitrogen can cause oxygen deficiency hazards. But, we know how much gas is made when the LN2 boils and we know how big the room is. A little math keeps us safe.
@TheSweetalchemist Well, the easy way to prevent it is to not do it. You are basically betting that the heat capacity of your mouth can outrun the heat capacity of the cold food item. I'd especially avoid anything that can absorb the liquid nitrogen. Steve tried cotton candy in liquid nitrogen once and that was a mistake since the cotton candy acted like a sponge. Rice krispies would probably have the same problem. Popcorn would also make me nervous. I'd be more willing to try marshmallows.
@iJell0 Where can I get it? Typically from the fill station in the Test Lab. But, I'm guessing you're really asking where you can get it. Look in the yellow pages under 'welding supply.' Companies that sell gases to welders typically have liquid nitrogen. Whether or not they'll sell it to you is another question. And, as always, be aware of the dangers and proper handling/transportation/usage procedures of liquid nitrogen.
hey steve, why not try making ice cream droplets with liquid nitrogen in a tank, and putting a metal sieve on top, and just letting the melted ice cream drop down to the liquid nitrogen, after its all frozen, scoop it out with a strainer, and try it.
I hav a question to ask that only you guys at jeffersonlabs might know. this was on an NWEA test that we take at my school, i was doing the science test and this was the question (the numbers with the slashes are fractions):
@Snakecharmer95 Sorry, but the answer is D. Fission is what happens when a large atom is split into smaller pieces. That's what's happening in D, an atom of uranium (with 143 neutrons and 92 protons) brakes into an atom of barium (86 neutrons, 56 protons), at atom of krypton (55 neutrons and 36 protons) and 3 free neutrons upon absorbing a neutron. If you count them up, the numbers of protons and neutrons are the same on both sides of the equation, so it's balanced. A and B are fusion... (cont)
@Snakecharmer95 (cont) ...which is what happens when smaller atoms are joined together to make a larger atom. C is a regular chemical reaction. It's basically combustion. Uranium oxide and carbon tetrafluoride are burned (with oxygen) to make uranium hexafluoride and carbon dioxide. E is also a normal chemical reaction. I think that kind of reaction (A + B -> AB) is called a synthesis reaction.
@JeffersonLab ok now i get it. i never really saw that the #'s in the fractions in the right add up to the bigger fraction on the left. thx for clearing that up. you guys are awesome.
@Snakecharmer95 Keep in mind that those aren't actually fractions (if they were, the 1/0 would cause some trouble...). It's a kind of shorthand telling you the number of nucleons (protons + neutrons) and the number of protons. Usually, the top number is written in superscript and the lower number is written in subscript, usually to the left of the element's symbol. So, 12/6 C means that carbon has 12 particles in its nucleus and 6 protons in its nucleus. So, it has 6 proton and 6 neutrons.
@askyurself The ice cream wasn't full of liquid nitrogen when we were eating it. The liquid nitrogen had boiled off so, while we weren't eating it, we were breathing it.
@JeffersonLab ohhh.... so that's the way it is.. well.. i was thinking that.. you put the ice cream mixture to a sealed container then sink it to liquid nitrogen... so it will be more safer to eat.. is that a good idea?.. or pouring LN will be better?..
@askyurself You could do it that way but, as long as the liquid nitrogen is clean (not contaminated with compressor oil or something), there's no harm in pouring it directly into the ice cream mix like we did. The nitrogen will completely boil off and, if it's too cold, the ice cream will be nearly impossible to scoop. Of course, it could get too cold with the sealed container method, too.
@JeffersonLab ahhh.. as you said on rodriguezadam11 on scooping the ice cream... thanks for that!.. i also remembered about the LOx on your other vid.. can it be used to cool the ice cream?.. like LN2 does?..
@askyurself Liquid oxygen is nearly as cold as liquid nitrogen, so it would cool the mixture just as well. Of course, you'd be running the risk of setting your ice cream on fire with a stray spark if you used liquid oxygen.
@zjd92 The fog isn't actually nitrogen vapor. It's regular water-clouds caused by the liquid nitrogen/cold nitrogen gas cooling the water vapor in the air to below the dew point. If we were doing this somewhere with very low humidity, rather that in swampy, costal Virginia, you wouldn't see any fog at all.
@rodriguezadam11 It tastes about the same. It kinda depends on what you use to make it with. I don't know the exact temperature it was when we were eating it. Sort of normal ice cream cold, I guess. The thing is, if it's too cold, it's as hard as a rock and it physically can't be scooped. It was a little slushy, so it couldn't have been too much below 0˚C.
why don't you just pour the liquid nitrogen directly from the big dewar? pouring it into the smaller dewar wastes nitrogen as some of them will fly out.
@Almontmarine The big Dewar is really made for storage. It has a narrow neck, in part, to help slow the flow of nitrogen out of the container (if it toppled over, it wouldn't come out all at once). We can better control the amount of nitrogen that we use with the open mouth Dewar since we can reach in with a ladle and scoop some out, etc...
@Almontmarine She's kind of like a unicorn - a largely mythical creature who occasionally makes appearances.
When this video was made, Stephanie worked in the Public Affairs group. Since then, Stephanie has changed jobs within the Lab. Since she's no longer in Public Affairs, it's hard to justify taking her away from her job to make these videos.
@560science Yes and no. Liquid nitrogen can change the nitrogen in the air into a liquid. In order to do this, the nitrogen in the air has to be cooled. The thing that does the cooling is the liquid nitrogen. Cooling nitrogen in the air causes some of the liquid nitrogen to change to a gas. The net result is less liquid nitrogen.
Hi, how much liquid nitrogen was used in this video? Do economies of scale work for this experiment or is it more the reverse? I mean, is it more efficient to make a little at a time, or alot at a time? I'm interested in doing this at a festival and I'd like to make about 40gallons of ice cream over a week..
@cloudedknife The large Dewar holds 10 liters, but we didn't come close to using all of it (and, if I recall correctly, it wasn't even full at the time - it was leftover from a demo earlier in the day). To cool the amount of ice cream we made takes about 3 liters or so.
Small batches are easier to make than large, mainly from a mixing/stirring standpoint. With very large batches, you begin to run into ODH concerns as well.
Isnt that dangerous? Wouldnt you be eating liquid nitrogen or would it just boil off and just turn the milk substance cold enough to turn into ice cream like you just did?
aj7cool7 5 days ago
@aj7cool7 Yeah, you don't eat it unless the nitrogen has completely boiled away -and- if it's still soft enough to scoop. It's possible to cool it so much that it becomes dangerous, but it'll be too frozen to scoop if it is.
JeffersonLab 5 days ago
@Jeffersonlab, thanks! lol ps my science teacher showed ur videos to us. i wanna go to ur lab for a feild trip but im not even sure thats possible...anyway, thanks! (:
jcullom 2 weeks ago
hullo. when im older i wunna work at jefferson lab. right now im only 11 but still knoe for a fact i wunna work there. how old would i have to be? where are u guys located? and how do i sign up?
jcullom 2 weeks ago
@jcullom You have to be at least 16 to work here. Jefferson Lab is located in Newport News, Virginia. When the time is right, you can apply for a position via our website. Good luck and thanks for watching!
JeffersonLab 2 weeks ago
So, where could the general public obtain liquid nitrogen?
I've researched proper handling measures, but I doubt you can just buy liquid nitrogen without some kind of permit.
chumpdoc 3 weeks ago
@chumpdoc Assuming that you have the training and equipment to safely transport, store and use liquid nitrogen, try a local welding supple store.
JeffersonLab 3 weeks ago
umm can u really eat it???
Uskidsrock 3 weeks ago
@Uskidsrock That's what we're doing at the end of the video.
JeffersonLab 3 weeks ago
A couple of questions. Where is Jefferson Labs? In 2 years I will turn 16 and would love to work there, Will you allow anyone with scientific knowledge to work there? And finally, How much does a gallon of liquid nitrogen cost? Please answer to them all. Thank you.
superfrenchfrys 3 weeks ago
@superfrenchfrys Jefferson Lab is in Newport News, Virginia. While we do hire students 16 and older to work at the Lab, there is an application process. For us, liquid nitrogen costs about $1 a gallon.
JeffersonLab 3 weeks ago
@JeffersonLab I thought I recognized the name Jefferson Lab... do you guys go to middle schools or do presentations for them? I'm pretty sure I saw you guys somewhere a few years back when I was in middle school. I'm in Chesapeake.
Roland0314 2 weeks ago
@Roland0314 Yes, we frequently so presentations at middle schools. We're in Newport News, so Chesapeake is a frequent destination.
JeffersonLab 2 weeks ago
but can u realy eat it?
pikmin2244 3 weeks ago in playlist Frostbite Theater
@pikmin2244 @arli6565 Yes. We are eating it at the end of the video.
JeffersonLab 3 weeks ago
Is it really eatable?
arli6565 3 weeks ago
where can you buy liquid nitrogen and if you stick your hand to the bottom would it freeze an is the top layer drinkable?
kellymich12 3 weeks ago
@kellymich12 Your final two questions make me want to not answer the first.
JeffersonLab 3 weeks ago 13
@JeffersonLab i just want to know because there was vid of a man drinking it and im 11 id rather wait tilcollege to buy it i just wanna know
kellymich12 3 weeks ago
@kellymich12 If you stick your hand in it, your hand will eventually freeze. You cannot safely drink liquid nitrogen.
JeffersonLab 3 weeks ago
does liquid nitrogen leave an aftertaste and does it leaves residue after it evaporates?
AngryLlamaAttack 3 weeks ago
@AngryLlamaAttack If the nitrogen plant's compressors are functioning properly, there shouldn't be any residue. The worst thing that could happen is that some oil works its way into the nitrogen. That oil would be left behind as the nitrogen boils off. That wouldn't be great.
Nitrogen has no aftertaste. Nitrogen doesn't have taste. If it did, you'd be tasting it all the time since 78% of the air is nitrogen.
JeffersonLab 3 weeks ago
so do I, kokoromichiwa.
and this video isn't helping me any. lol.
lcrs5050 3 weeks ago
Or by dipindots there nitrogen ice cream complete.
darkheat246 1 month ago
@JeffersonLab about how many gallons of liquid nitrogen would you say it took for this experiment?
lacrossefan8 1 month ago
@lacrossefan8 No more than one.
JeffersonLab 1 month ago
awww... at the end you should have not told them that its made with liquid nitrogen and the in the middle of eating it you would say "its made with liquid nitrogen!"! that'd be so hilarious!
CrazyPlayer747 1 month ago in playlist Frostbite Theater
@CrazyPlayer747 Except all of those people were there during the filming. We'll need to find an unsuspecting group next time...
JeffersonLab 1 month ago
"Stephanie scoops, Joanna stirs." Sure, make the women do all the work. :p
I liked how natural you guys were in this video, too. :)
odysseus9672 1 month ago
Now I want some ice cream
kokoromichiwa 1 month ago 5
@ jefferson labs
So if a drop lands on your skin it'll do the same? What damage will it do before boiling away?
Weapon283 1 month ago
@Weapon283 If it's a small enough drop, it won't do any damage. But, since we can't really control the amount that might accidentally get on us, we wear gloves!
JeffersonLab 1 month ago
OMG I LOVE YOU GUYS but 1 question if you have to clean up the liquid nitrogen then why spill it?
CapriSun43 1 month ago
@CapriSun43 We don't have to clean it up. It boils and changes to a gas as soon as it touches anything in the room.
JeffersonLab 1 month ago
omg your awesome
cokblaster12166 1 month ago
So if you would spill all that nitrogen on the table you dont have to clean up anything?
EvilMyselfFTW 1 month ago
@EvilMyselfFTW Correct.
JeffersonLab 1 month ago
@EvilMyselfFTW It just boils away to nothing when exposed to room temperature. By the time 'clean-up' would come to mind, there's nothing left to clean up.
SeemsWrongSomehow 1 month ago
You can eat it because all the nitrogen turned to gas and floated out if the ice cream
Chickenwingification 1 month ago
@Abby11101 To actually go to the Lab? There is no minimum age. If you want to work here, you have to be at least 16.
JeffersonLab 1 month ago
truly awesome, you're vids are absolutely fascinating
XxUpliftingTranc3xX 1 month ago
Can you eat the ice cream?
Duhitsandy123 1 month ago
@Duhitsandy123 Yes. We're eating it at the end of the video.
JeffersonLab 1 month ago
@JeffersonLab I thought that if you eat or drink liquid nitrogen you could freeze to death.
Duhitsandy123 1 month ago
@Duhitsandy123 We didn't eat or drink liquid nitrogen. We were eating ice cream. The liquid nitrogen had long since boiled away.
JeffersonLab 1 month ago
WAIT... YOU CAN ACTUALLY EAT THAT?! :O
cejason 1 month ago
I want some :D
4775327 1 month ago
Wait i dont get it... Why do they have so much liuid nitrogen??
JustAnAllycat 1 month ago
@JustAnAllycat Because we run a superconductive electron accelerator and liquid nitrogen is a nice, inexpensive way to cool helium to 77 K. We actually need helium at 2.2 K, but one must start somewhere.
JeffersonLab 1 month ago
@JeffersonLab which can not go below zero kelvin, celsius,or fahrenheit
just wondering :)
OPSxDOMIN4TOR 1 month ago
@OPSxDOMIN4TOR Kelvin is an absolute scale. Zero Kelvin is as low as you can go.
JeffersonLab 1 month ago
@JeffersonLab where do you get liquid nitrogen? can you make it?
russianbeast23 1 month ago
@russianbeast23 We get liquid nitrogen from the Test Lab fill station. We don't make it here at the Lab. We have a contract with an industrial supplier.
JeffersonLab 1 month ago
Is it just me or the girls didn't need to have those big fat gloves on to pour the milk and sugar into the bowl? lollllllll
X0verXDriveX 1 month ago
thats how dippin dots are made
59legendz 1 month ago
mm yum....
techANDstuff786 1 month ago
was it good
mermaidsrockmyworld 1 month ago
@mermaidsrockmyworld Yes, it was.
JeffersonLab 1 month ago
@JeffersonLab aw i wish i had some
mermaidsrockmyworld 1 month ago
@JeffersonLab how come the sugar and milk and wtv didnt freeze when you poured liquid nitrogen?? Why when you pour it on the table it doesnt freeze?? if thats the case why wear gloves?? can i throw liquid nitrogen onto your face?? what would happen....serious ?'s please answer them all please
MrChannel5news 1 month ago
@MrChannel5news 1. Not enough nitrogen was added to make it freeze. Put an ice cube in a swimming pool and no one notices a temperature drop. Put an iceberg in and it's a different story.
2. The table is frozen. It's a solid.
3. Things get cold. Nitrogen splashes. The possibility of getting hurt exists.
4. No.
5. We'd have you arrested for malicious assault.
JeffersonLab 1 month ago
Its safe to eat something with liquid nitrogen on it
diginut96 1 month ago
@diginut96 No, but there was no liquid nitrogen on it when we ate it. The nitrogen cooled the ice cream as it boiled off. Once it boiled away, then we ate it. Since it was still soft enough to scoop, we knew that it wasn't cold enough to be dangerous.
JeffersonLab 1 month ago
@JeffersonLab Steve! (I think it is) ur just like Simon Lane from the yogscast (BlueXephos) he loves blowing up stuff in minecraft and you like putting liquid nitrogen on things!
CWsmarty 1 month ago
is it edible?
TheDarthVaderJed 1 month ago
@TheDarthVaderJed Yes. That's why we're eating it at the end. Realize that the nitrogen's long gone. It did its job of cooling the ice cream mixture. It would be a very bad idea to eat it if the liquid nitrogen were still in it.
JeffersonLab 1 month ago
alot of sugar o.o
VocaloidFanzForeva 1 month ago
so is it completely safe to eat?
boxman1571 2 months ago
@boxman1571 Once the nitrogen boils away and if the ice cream is soft enough to be scooped, yes.
JeffersonLab 2 months ago
i am thinking of making this, but i need to know, how much liquid nitrogen is needed here?
crazybutawesum 3 months ago
@crazybutawesum For what we made, 5 liters is more than enough.
JeffersonLab 3 months ago
that H6155 v16 codec
vip2oo4 3 months ago
@vip2oo4 What now?
JeffersonLab 3 months ago
How is that healthy I might ask
SuperGmodkid 3 months ago
@SuperGmodkid Well, it is ice cream. It's not but so healthy...
JeffersonLab 3 months ago
Instant ice cream... Cool trick, no pun intended. :o)
VulpesFidelis 3 months ago
quiero mi helado de nitrogeno liquido
MrMarttin 5 months ago
@MrMarttin Assuming that you have the proper training and equipment, try a local welding supplier.
JeffersonLab 5 months ago
I'm a klutz. I'd knock over the liquid nitrogen and spill it all over myself. That would be bad.
ScytheNoire 5 months ago
I tried making ice cream using dry ice, the result is not the same with using liquid nitrogen. It's not good. It tasted carbonated. What's the reason for this?
TheSweetalchemist 5 months ago
@TheSweetalchemist There's a lot of water in the ice cream mix and carbon dioxide is soluble in water. Once it's in there, some of the carbon dioxide reacts with water to form carbonic acid. So, yeah, I guess you could say you carbonated it.
JeffersonLab 5 months ago 6
How cold is the container holding the Nitrogen?
momdieddad 6 months ago
@momdieddad Inside the container down at the level of the liquid, it's 77 K. The outside of the container is essentially room temperature (~300 K).
JeffersonLab 5 months ago
So, the worst that can happen if you eat the ice cream you make is you get a mouthful of Nitrogen gas? That's pretty cool =)
Nerketur 6 months ago
nom nom nom
malachaiblowers 6 months ago
@JeffersonLabs when you pour the liquid nitrogen into the ice cream does it evaporate before you eat it
iShaneFan 7 months ago
@iShaneFan Yes. You have to let it evaporate before you can eat it.
JeffersonLab 7 months ago
Are all of those people at the end of the movie employees of jefferson lab?
percussionist624 7 months ago
@percussionist624 For the most part, yes. One person is a student intern so, technically, she wasn't a Lab employee. Everyone else is. Or, at least, was at the time of the filming.
JeffersonLab 7 months ago
Wow, all your videos are wonderful. They're very fun to watch, so thank you!
Unregicide 7 months ago
@Unregicide Thank you and thanks for watching!
JeffersonLab 7 months ago
first of all i like liquid nitrogen icecream better than real icecream because it tastes so much sweeter to me but im pratically eating a science experiment
ohaidere12 8 months ago
Thank you very much for your quick response and i willl be really careful if i ever use it. Again thank you very much for you help and advise!!
2010fatimae 8 months ago
It's the nitrogen too expensive?and is it easy to find and or buy?
2010fatimae 8 months ago
@2010fatimae It's not too expensive for us, but we buy it in volume. The Lab pays on the order of $1 per gallon. It's also plenty easy for us to find since it's all over the place here. For you, you would check your nearest welding supply store. Check the Yellow Pages for 'welding supply.' But, make sure you have the proper equipment and knowledge to safely handle/use liquid nitrogen. It can hurt/kill you if you don't know what you're doing.
JeffersonLab 8 months ago
@2010fatimae it.s not expensive...nitrogen is 78% of the atmosphere
inginerul1987 8 months ago
Wouldn't this be way to cold to safely eat?
zppbonzo 8 months ago
@zppbonzo No, as demonstrated by us eating the ice cream at the end of the video!
The colder the ice cream is, the more difficult it is to scoop. If it's dangerously cold, it's too brick-like to do much of anything with. If it's easily scooped, it's not too cold.
JeffersonLab 8 months ago
@JeffersonLab I figured you let it cool off.
zppbonzo 8 months ago
@zppbonzo You mean 'warm up,' right?
JeffersonLab 8 months ago
@JeffersonLab Wow, did I really say that?
zppbonzo 8 months ago
That is an interesting way. However, I don't think my household owns liquid nitrogen. I guess perhaps water isn't the only part of matter that can become solid, liquid and gas.
KBAFourthtime 8 months ago
Does your dewar make a loud 100 decibel noise when it releases excess pressure??? How do you prevent it??? As that would probably drive
away customers.
TheSweetalchemist 8 months ago
@TheSweetalchemist No, our Dewar is unpressurized. Excess gas is vented as it is produced. It has no relief valve.
JeffersonLab 8 months ago
Sence the nirogen boild at -195.75 in celcius will in boil in antartica under and coldest winter or will the ice, humidity or something else there prevent it from doing that?
ahmeeeeeeeeeeeed 8 months ago
@ahmeeeeeeeeeeeed If you dump liquid nitrogen on the ground during the coldest night in Antarctica, the liquid nitrogen will quickly boil away. It's nowhere near cold enough there to keep nitrogen as a liquid without using an insulated container. If it were, the Earth's atmosphere would condense out during the Antarctic winter.
JeffersonLab 8 months ago
@JeffersonLab Thanks man your the best
ahmeeeeeeeeeeeed 8 months ago
but n2 is dangerous for us
rexdragon89 9 months ago
@rexdragon89 Nitrogen isn't actively dangerous. 78% of the air is nitrogen and we get along with it just fine. The problem becomes when there is a lack of oxygen. Breathing a pure nitrogen atmosphere will kill you, but not because of the nitrogen. The nitrogen won't do anything to you. It won't do anything for you, either. It's the lack of oxygen that's an issue.
JeffersonLab 9 months ago 9
u could open an ice cream shop! btw is liquid N2 vry impt in ur lab? because i can tell...
Almontmarine 9 months ago
@Almontmarine The liquid nitrogen is more of a means to an end. What we really need is liquid helium at 2.2 K. Liquid nitrogen is a convenient way to inexpensively cool the helium to 77 K. It's the other 74.2 K worth of temperature drop that's tricky.
JeffersonLab 9 months ago
@JeffersonLab y'all need it? omg that's vry cold. 2.2 Kelvin!!!
Almontmarine 9 months ago
@Almontmarine Yep. Quite chilly.
JeffersonLab 9 months ago
@JosiahChristian123 (cont) ...are loose. If liquid nitrogen gets in or goes through them, they are easily and quickly removed with a flick of the wrist. I have personally been doing pubic liquid nitrogen demonstrations for 19 years. I've probably 'spilled' something like 2,000 gallons of nitrogen. I think I've had to ditch my gloves once. I have frozen bits of myself with the nitrogen exactly twice. Both times, I -wasn't- wearing my gloves. I don't think that's a coincidence.
- Steve
JeffersonLab 9 months ago
@JosiahChristian123 (cont) ...protect you from the liquid for a few moments. But, when you use liquid nitrogen, it typically makes -other- things cold, too. Touch a piece of cold metal without a glove and there won't be anything to protect you. The LE depends on the gas layer produced by the vaporization of the liquid. Other, cold items won't do that. So, the gloves are a must. "But what if the liquid nitrogen gets in your gloves?!" I hear you exclaim. That's why the gloves we wear... (cont)
JeffersonLab 9 months ago
@JosiahChristian123 Keep in mind that we have years and years of experience using liquid nitrogen, so we know how to spill liquid nitrogen 'everywhere' safely. While it may appear that we are being careless with the liquid nitrogen, that isn't the case.
As far as the gloves are concerned... they are appropriate safety gear. Some people have the misconception that you are better off not wearing gloves when handling liquid nitrogen. This isn't the case. Sure, the Leidenfrost effect will... (cont)
JeffersonLab 9 months ago
I would appreciate any help finding information on designing an exhaust system for liquid nitrogen vapor. I cannot find any information on velocity in ductwork, duct materials, type of insulation, type/material for exhaust fan that can handle the low temperatures, etc. If you know of any resources, I thank you in advance.
TheSweetalchemist 9 months ago
i saw yall
jayking1399 9 months ago
Do you think the LN2 tank is way too big for this resto in these videos?:
- Sub Zero Ice Cream Utah
-The Ice Cream Bloke - Ep 24 Sub Zero Ice Cream
TheSweetalchemist 10 months ago
@TheSweetalchemist All I can tell you is what the DOE's rules are for this. Personally, I think what they are doing in those other videos is irresponsible, but that's between them and their insurance company.
JeffersonLab 9 months ago
May I know the ratio/formula of LN2 volume to room size?
I'm getting a 180 liter cylinder of LN2 and the room is like 10 by 10 square meter.
Is that compatible?
TheSweetalchemist 10 months ago
@TheSweetalchemist Assume LN2 expands by a factor of 1,000 when it changes to a gas (it's actually less that, but it gives us a safety factor). That means one liter of LN2 makes 1 cubic meter of N2. Find the volume of the room and then use this equation:
% after spill = 21 * (room volume - N2 volume) / (room volume)
Assume your room is 3 m high. It then has a volume of 300 m^3. A 160 liter spill results in 21 * 140 / 300 = 9.8% O2.
That's way too low. 19.5% is the minimum we allow.
JeffersonLab 10 months ago
@JeffersonLab Well, actually, 19.5% is when the ODH alarms sound. The calculation must result in an oxygen percentage greater that 19.5%, not greater than or equal to 19.5%.
JeffersonLab 10 months ago
@JeffersonLab
Room is
Height: 11 feet
Width; 12 feet
Lenght: 15 feet
Liquid Nitrogen Cylinder: 180 Liters
I won't actually use the 180 Liters in one spilling, maybe 3 liters at a time for making ice cream.
TheSweetalchemist 10 months ago
@TheSweetalchemist Well, that's even worse then. The room's only 56 m^3, which is less than the gas equivalent of the liquid nitrogen. If you have a 180 liter Dewar in the room, that's the potential spill you have to worry about. It could fill your room three times over with nitrogen gas. Not what you want to deal with and wouldn't be allowed here.
Three liters of liquid would be allowed under our rules. A spill that size would only reduce the oxygen content to 19.9%.
JeffersonLab 10 months ago
@JeffersonLab
Oh no! I'm in trouble. Would installing a kitchen exhaust fan help???
Would it make it to an acceptable level?
I don't want to suffocate the people in the room. Need your expert advice.
TheSweetalchemist 10 months ago
@TheSweetalchemist The easiest solution is to not store/use the 180 liter Dewar in that room. Keep it outside, draw the three liters you want and bring that into the room.
JeffersonLab 10 months ago
@JeffersonLab
Thank you so much for the help. I will return the 180 liter dewar.
I dont want to put it outside as someone might steal it.
What is a suitable size of dewar for my kitchen room?
Room is Height: 11 feet
Width; 12 feet
Lenght: 15 feet
TheSweetalchemist 10 months ago
@TheSweetalchemist If you were at our Lab, you would have to keep the amount of liquid nitrogen in that size of a room to less than 4 liters.
JeffersonLab 10 months ago
Wouldn't the smoke from nitrogen make you suffocate hazard due to its oxygen displacement characteristics?
TheSweetalchemist 10 months ago
@TheSweetalchemist The 'smoke' is condensed water vapor. How much you see is dependent more on how humid it is rather than how much nitrogen is spilt. But, yes, liquid nitrogen can cause an oxygen deficiency hazard. But, we know the volume of the room and how much liquid nitrogen expands when it boils, so we can calculate how much liquid nitrogen is safe to bring into a particular area. That's a 10 liter tank (that wasn't even full). The room we were in is rated for 20 liters.
JeffersonLab 10 months ago
Wouldn't drinking LN2 make your tongue and teeth shatter?
Wouldn't keeping faces near nitrogen make you suffocate hazard due to its oxygen displacement characteristics?
TheSweetalchemist 10 months ago
@TheSweetalchemist Drinking liquid nitrogen certainly wouldn't be a great thing, but no one in this video drank liquid nitrogen. The nitrogen was used to cool/freeze the mixture. Doing so caused the liquid nitrogen to boil away. There was no liquid nitrogen in the final product.
Spilling too much liquid nitrogen can cause oxygen deficiency hazards. But, we know how much gas is made when the LN2 boils and we know how big the room is. A little math keeps us safe.
JeffersonLab 10 months ago
@JeffersonLab
There is this video on youtube: Chris Cognac "Burns" Tongue Bloody with Liquid Nitrogen.
Where his tongue is blisterred and bloody upon eating a potato chip dipped in LN2.
How do I prevent bloody tongue from happening?
I plan of serving liquid nitrogen popcorns, rice krispies, and marshmallows to my friends.
TheSweetalchemist 10 months ago
@TheSweetalchemist Well, the easy way to prevent it is to not do it. You are basically betting that the heat capacity of your mouth can outrun the heat capacity of the cold food item. I'd especially avoid anything that can absorb the liquid nitrogen. Steve tried cotton candy in liquid nitrogen once and that was a mistake since the cotton candy acted like a sponge. Rice krispies would probably have the same problem. Popcorn would also make me nervous. I'd be more willing to try marshmallows.
JeffersonLab 10 months ago
@JeffersonLab
But a lot chefs are doing it, like in these videos:
Richard Blais freezeing popcorn in liquid nitrogen
Richard Blais Prepares Garrett Frozen Popcornsicles on The Today Show
Dragon's Breath Popcorn
TheSweetalchemist 10 months ago
@TheSweetalchemist Anything that has nooks and crannies where the liquid itself could hide within would concern me. Personally, I would avoid it.
JeffersonLab 10 months ago
I think you ice-cream is "colder" than the other's :D
Badguy625 10 months ago
Where can you get liquid nitrogen?
iJell0 10 months ago
@iJell0 Where can I get it? Typically from the fill station in the Test Lab. But, I'm guessing you're really asking where you can get it. Look in the yellow pages under 'welding supply.' Companies that sell gases to welders typically have liquid nitrogen. Whether or not they'll sell it to you is another question. And, as always, be aware of the dangers and proper handling/transportation/usage procedures of liquid nitrogen.
JeffersonLab 10 months ago
hey steve, why not try making ice cream droplets with liquid nitrogen in a tank, and putting a metal sieve on top, and just letting the melted ice cream drop down to the liquid nitrogen, after its all frozen, scoop it out with a strainer, and try it.
meowmeow5 11 months ago
I hav a question to ask that only you guys at jeffersonlabs might know. this was on an NWEA test that we take at my school, i was doing the science test and this was the question (the numbers with the slashes are fractions):
Which represents a nuclear fission reaction?
A: 96/42 Mo+2/1H➞97/43 Tc + 1/0n
B: 27/13 Al+4/2 He➞30/15 P+1/0n
C: 2 UO2+3CF4+O2➞2 UF6+3 CO2
D: 235/92 U+1/0n➞142/56 Ba+91/36 Kr+3 1/0n
E: Ba+F2➞BaF2
Plz tell me the right answer I sed C. THX!!!
Snakecharmer95 1 year ago
@Snakecharmer95 Sorry, but the answer is D. Fission is what happens when a large atom is split into smaller pieces. That's what's happening in D, an atom of uranium (with 143 neutrons and 92 protons) brakes into an atom of barium (86 neutrons, 56 protons), at atom of krypton (55 neutrons and 36 protons) and 3 free neutrons upon absorbing a neutron. If you count them up, the numbers of protons and neutrons are the same on both sides of the equation, so it's balanced. A and B are fusion... (cont)
JeffersonLab 1 year ago
@Snakecharmer95 (cont) ...which is what happens when smaller atoms are joined together to make a larger atom. C is a regular chemical reaction. It's basically combustion. Uranium oxide and carbon tetrafluoride are burned (with oxygen) to make uranium hexafluoride and carbon dioxide. E is also a normal chemical reaction. I think that kind of reaction (A + B -> AB) is called a synthesis reaction.
JeffersonLab 1 year ago
@JeffersonLab ok now i get it. i never really saw that the #'s in the fractions in the right add up to the bigger fraction on the left. thx for clearing that up. you guys are awesome.
Snakecharmer95 1 year ago
@Snakecharmer95 Keep in mind that those aren't actually fractions (if they were, the 1/0 would cause some trouble...). It's a kind of shorthand telling you the number of nucleons (protons + neutrons) and the number of protons. Usually, the top number is written in superscript and the lower number is written in subscript, usually to the left of the element's symbol. So, 12/6 C means that carbon has 12 particles in its nucleus and 6 protons in its nucleus. So, it has 6 proton and 6 neutrons.
JeffersonLab 1 year ago
@JeffersonLab ooohhhh ok i just never really assumed they were fractions cuz of the slash. but wat can i say i'm only a freshman in high school :P
Snakecharmer95 1 year ago
@Snakecharmer95
omg and i need to do this for high school or college in the future, O_O
BlackOpsXNhanX 1 year ago
scary white girl! LOL look at 1:28
bigpepe1987 1 year ago
can i eat it
TheBomerz 1 year ago
@TheBomerz Other than the fact that you aren't physically here to do so, yes, you can eat it.
JeffersonLab 1 year ago 8
@JeffersonLab Lol, I'm loving your comments
pipkguitar 1 year ago
is it safe to eat that kind of ice cream which is full of nitrogen?......
askyurself 1 year ago
@askyurself The ice cream wasn't full of liquid nitrogen when we were eating it. The liquid nitrogen had boiled off so, while we weren't eating it, we were breathing it.
JeffersonLab 1 year ago
@JeffersonLab ohhh.... so that's the way it is.. well.. i was thinking that.. you put the ice cream mixture to a sealed container then sink it to liquid nitrogen... so it will be more safer to eat.. is that a good idea?.. or pouring LN will be better?..
askyurself 1 year ago
@askyurself You could do it that way but, as long as the liquid nitrogen is clean (not contaminated with compressor oil or something), there's no harm in pouring it directly into the ice cream mix like we did. The nitrogen will completely boil off and, if it's too cold, the ice cream will be nearly impossible to scoop. Of course, it could get too cold with the sealed container method, too.
JeffersonLab 1 year ago
@JeffersonLab ahhh.. as you said on rodriguezadam11 on scooping the ice cream... thanks for that!.. i also remembered about the LOx on your other vid.. can it be used to cool the ice cream?.. like LN2 does?..
askyurself 1 year ago
@askyurself Liquid oxygen is nearly as cold as liquid nitrogen, so it would cool the mixture just as well. Of course, you'd be running the risk of setting your ice cream on fire with a stray spark if you used liquid oxygen.
JeffersonLab 1 year ago
@askyurself The nitrogen would've turned to vapor after it hit the ice cream thats what all the fog was.
zjd92 1 year ago
@zjd92 The fog isn't actually nitrogen vapor. It's regular water-clouds caused by the liquid nitrogen/cold nitrogen gas cooling the water vapor in the air to below the dew point. If we were doing this somewhere with very low humidity, rather that in swampy, costal Virginia, you wouldn't see any fog at all.
JeffersonLab 1 year ago
does it taste any different than regular ice cream? how cold was it when you were eating it? im in the mood for ice cream now :D
rodriguezadam11 1 year ago
@rodriguezadam11 It tastes about the same. It kinda depends on what you use to make it with. I don't know the exact temperature it was when we were eating it. Sort of normal ice cream cold, I guess. The thing is, if it's too cold, it's as hard as a rock and it physically can't be scooped. It was a little slushy, so it couldn't have been too much below 0˚C.
JeffersonLab 1 year ago
why don't you just pour the liquid nitrogen directly from the big dewar? pouring it into the smaller dewar wastes nitrogen as some of them will fly out.
Almontmarine 1 year ago
@Almontmarine The big Dewar is really made for storage. It has a narrow neck, in part, to help slow the flow of nitrogen out of the container (if it toppled over, it wouldn't come out all at once). We can better control the amount of nitrogen that we use with the open mouth Dewar since we can reach in with a ladle and scoop some out, etc...
JeffersonLab 1 year ago
@JeffersonLab but it doesn't matter. the more (nitrogen) the merrier.
Almontmarine 1 year ago
who's stephanie?
Almontmarine 1 year ago
@Almontmarine She's kind of like a unicorn - a largely mythical creature who occasionally makes appearances.
When this video was made, Stephanie worked in the Public Affairs group. Since then, Stephanie has changed jobs within the Lab. Since she's no longer in Public Affairs, it's hard to justify taking her away from her job to make these videos.
JeffersonLab 1 year ago
Where can you get liquid notrogen? Im pretty sure corner shops dont sell it
elanso666 1 year ago
@elanso666 If the corner shop happens to be a welding supply company, it probably does.
JeffersonLab 1 year ago
What's a half-and-half? I can see in the video that "half-and-half" looks something like milk.-__-"
Almontmarine 1 year ago
@Almontmarine It's half milk and half cream. It's typically used in coffee.
JeffersonLab 1 year ago
Did all of you enjoy the ice cream? Or was it a bit bad?
Almontmarine 1 year ago
@Almontmarine It's actually quite good.
JeffersonLab 1 year ago
Does liquid nitrogen grab nitrogen from the air and make more liquid nitrogen?
560science 1 year ago
@560science Yes and no. Liquid nitrogen can change the nitrogen in the air into a liquid. In order to do this, the nitrogen in the air has to be cooled. The thing that does the cooling is the liquid nitrogen. Cooling nitrogen in the air causes some of the liquid nitrogen to change to a gas. The net result is less liquid nitrogen.
JeffersonLab 1 year ago
Hi, how much liquid nitrogen was used in this video? Do economies of scale work for this experiment or is it more the reverse? I mean, is it more efficient to make a little at a time, or alot at a time? I'm interested in doing this at a festival and I'd like to make about 40gallons of ice cream over a week..
cloudedknife 1 year ago
@cloudedknife The large Dewar holds 10 liters, but we didn't come close to using all of it (and, if I recall correctly, it wasn't even full at the time - it was leftover from a demo earlier in the day). To cool the amount of ice cream we made takes about 3 liters or so.
Small batches are easier to make than large, mainly from a mixing/stirring standpoint. With very large batches, you begin to run into ODH concerns as well.