I was not interested because I did not really understand what was going on here(I have a BSc in computer science) - I think we need more background, expecting us to say "wow!" is not really fair given the lack of information you have supplied us with...
@jagara1 I don't understand the process either ( I have a degree in nothing,) but that's hardly relevant. The fact that it's something novel that you don't usually see fluids doing "should" be enough to pique your interest (if you're into these sorts of things.)
@jagara1 You need to do some reading to understand surface tension. No one here knows how much you do or do not know already nor could we explain it to you without that knowledge. Hell, Wikipedia should have a long article that can answer your questions.
@jagara1 Hahahaha. I'm not your teacher nor do I owe you anything. Be proactive and go find the answers yourself. You're already signed into Google, try going to their homepage and typing in your question.
@DubIDubblix You said - "The surface tension disappears. I have no degree and was able to grasp it." - I just skimmed through the wiki on surface tension and am most impressed that you understand this area given the molecular and mathematical complexity of surface tension. It does not answer how when surface tension disappears that a liquid will flow up vertically though.I don't think you understand the slightest thing about this area which is why you have fobbed me off with visiting the wiki
@jagara1 You misunderstand. I don't care if you understand it. I learned surface tension in high school and while the math is complex, I didn't have problems understanding it. Its not my problem that you don't get it.
I'm just studying this right now and I find this video very educational, besides the teacher (I imagine he's got a PhD or many) explains himself in a very understandable way. Thanks a lot!
its kind of cool how you can have the liquid and gaseous co2 under the same pressure... If I could ask, what is the pressure in the containing vessel professor..?
I working on solubility of salts right now learning about Ks. So how would the Ks value change in supercritical solvents than in conventional solvents? If you could ask the professor.
@yo6ial CO2 is not poisonous, literally. i mean it is for human beings and most animals but not for plants and that's only one example. the professor is correct when saying that.
@ericon52168 I'd imagine that I have a pretty good idea about what poison and poisonous means.
But, to my shame, I have no idea, whatsoever, about "meh" and "nvm" words are and, genuinely, no clue about what's that you're trying to say with "*headdesk*"
I'm afraid you have a pretty high CO2 concentration in your blood stream. :|
@ericon52168 Entirely true, :) but carbon dioxide can do just as much harm as carbon monoxide, even if different processes occur.
Even if the CO2 binds differently to hemoglobin and not actually displacing the O2 from it, it still severely decreases the amount of oxygen that can be transported.
Any chemical compound or element can be considered as poison/poisonous if small amounts can cause severe organism malfunction.
But I whose talking about a formulation issue. CO2 is not lethal in 2ppm.
CO2 is mostly stored as HCO3 ions, in the bloodstream, but excess will cause acidosis .
The increasing levels of HCO3 can only compensate.
Acidosis is a cause for hypoxiation of blood.
I'll also try to find out more about the chemical mechanism of low pH and oxygen transportation, but I suspect that it might have to do with Fe ions... :|
well I have not been in space yet.. But I'd think that the liquid would coat the glass container it is in... since its a gas and has zero viscosity. if the liquid was supspended away from the glass container, I'd think when heated the suspended ball of liquid would cloud up with bubbles and emit a layer of steam around it . the layer of steam would expand until there was no more liquid left.. after that you should have a perfect layer of helium condensation on the glass container.
Please live long! I want to work with you so badly! Sadly though, I must first get a piece of paper confirming that I am smart enough to do so... a couple years left to go!
@Gammaclipper As an asphyxiant, not as a poison. You would die by breathing pure CO2 for 5 minutes, but because your cells would not receive oxygen, not by poisoning. Just like you wouldn't die by poisoning if someone was choking you.
@ 5% breathing rate is 4X normal and the concentration becomes directly toxic
Symptoms of high or prolonged exposure to carbon dioxide include headache, increased heart rate, dizziness, fatigue, rapid breathing, visual and hearing dysfunctions. Exposure to higher levels may cause unconsciousness or death within minutes of exposure.
CO2 has been used to slaughter animals in some experiments to determine a new method of execution but hypoxia induced by nitrogen asphyxiation was found to be less painful.
oh god...that is so awesome!! i loved the little "storm" in there...i was just like O.O ...i really love supercritical fluids from now on..i just have to go and get some info's about it!!
@Defonthana Yes, providing it is stable and does not decompose at the critical temperature and pressure, every substance can be made supercritical. For instance, some of the very efficient power generation plants use supercritical steam.
This is my idea of nirvana:To see videos of sixty symbols, nottingham science and periodic videos with videos from the khan academy and it is even better if the professor is featured
I know what you mean, but it is not POISONOUS. Cabon Monoxide is poisonous, because it harms the body, but what he is saying is it's not like 'OMG there's a giant cloud of CO2 coming to eat mee!!', so its safe :)
ok he talked about CO2 as a solvent for some medicament- so the concentration of CO2 will be low in the blood. In this case it is non poisonous, until it's given in the right dose.
Giving too much= poisonous. The same like CO or CO2 coming out of the ground.
I would have expected this as part of a physics demonstration, we're seeing physical properties of phase-changes that are done and undone by physical means.. Was this experiment initially discovered performed by a physicist?
Why is it called a Super-critical Fluid, rather than a Super-dense Gas? Does the Super-critical Fluid have more properties related to fluids than gases? Is CO2 condensed to make this since at room temperature it's a gas already?
@Ducky1138 You appear to be unclear on the definition of fluid. In common speach they are often used interchangably but there is technically a difference.
Simply put, a fluid can be any material which can flow, which includes gasses as well as liquids. The critical point is the point on a pressure/temperature graph at which the transition from two distinct phases (liquid and gas) to a single phase (as shown in the video) occurs. As this exists above that point it is called super-critical.
This is an absolutely fascinating effect. It would be even more interesting if we tried this as a plasma in this kind of environment, it's stuff like this that makes me want to be a chemist O_o
Supercritical fluids form the harshest environments in the world. If you need to destroy a chemical or do wastewater treatment, it'll definitely do the trick...if the container lasts that is. Even high density stainless steel doesn't stand a chance for long. Containing the supercritical fluid while using it in an application is a very important problem to solve.
@baguazhang2 you dont need to raise it to critical temperatures and pressures to clean out "bad" things. it can do that at a much lower temp than 300 degrees cel
Just because something isn't poisonous doesn't mean it can't hurt you. If you lock yourself in a room full of pure, non-toxic CO2 you'll not last long.
But you don't have to worry about the CO2 in the global atmosphere getting high enough to suffocate you, because the heat it traps will make the planet unlivable long before that.
Depends on your definition of a pollutant. It fits the common definition:
"Pollution: introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem"
But other groups only consider elements toxic to humans (such as Carbon Monoxide) to be pollutants.
But all this detracts from the main issue, large amounts of man-made CO2 (mostly from burning coal, oil, etc.) is causing the planet to heat up at an accelerated rate.
Oh yeah it depends on definitions. But if you breathe CO2 for a long time then you stop, you have nothing bad left inside you. Try this with CO or with toxic substances. They will pollute your body.
The main issue was the word not the world. And it is an hoax.
I didn't talk about the global warming but about the global warmers and the incorrect use of a word.
Let's use pollutant for the nice metal dust you breath in several cities. It is polluting a lot of people just now.
That's definitely a good start on solvent use. It'll save lots of time and money. Solvents go through grant money like a kid goes through a pack of gum. :)) Seperating and repurifying solvent is time consuming which slows down progress, and also happens to be tedious. Just looking at it though, you know there'll be a breakthrough for more practical applications.
The significance is from 3:43 to the end. Since you can use the supercritical fluid as a solvent instead of an inorganic solvent, it would be useful in medicine where an inorganic solvent introduced into an organism might be harmful, for example.
Sorry, oomblikkies, I guess I didn't explain what I meant very clearly. If you needed to use a solvent in the manufacture of a replacement body part, maybe a mechanical heart or pacemaker, then a supercritical fluid used as a solvent would be a better choice than say, benzene (random example) that might remain residually and leach out. No body tissues need be harmed by the pressure ;p
There are a ton of other applications as well. Like I just mentioned in my mast post, you can run wastewater through a supercritical fluid to destroy the bad things and get clean water. Supercritical water forms an extremely, extremely harsh environment.
One little mistake in the vid: At 1:12, the professor says that "... eventually they become the same density, and the line in between it, completely disappears".
The two phases do not necessarily have to have the same density in order for the dividing line to disappear, but the same relative index of refraction. This is often demonstrated by sticking a glass spatula into a clear liquid of the same refracion index of the spatula: The part of the spatula that's in the liquid, becomes invisible!
Can lower temperature supercritical fluids be used as lubricants, or as a suspension matrix for industries ? It would appear that they have a greater measure of "slipperiness"
actually this one is kind of simple the atoms have no where to go while trying to move more, creating an expenonential growth effect temp wise, as the temp goes up the gas already, having no where to go the molecules rub and eventually do that =) (my guess)
It *does* increase the pressure. In fact if you look at a phase diagram at the triple point you can see what the pressure will be. That's why you need to take the pressure into consideration for your vessel design strength.
Very interesting! I was studying isothermal curves of a real gas, but I didn't understand them very much. I couldn't imagine a supercritical fluid and on my book there was written that it's impossible to see it. Thanks to my favourite chemist!
The video, his hair, and the fluid in the chamber are all at equilibrium in this video. That was awesome!
BluSTi 1 week ago
2:30 Took an arrow to the knee!
gosucoaching 1 month ago
I was not interested because I did not really understand what was going on here(I have a BSc in computer science) - I think we need more background, expecting us to say "wow!" is not really fair given the lack of information you have supplied us with...
jagara1 1 month ago
@jagara1 I don't understand the process either ( I have a degree in nothing,) but that's hardly relevant. The fact that it's something novel that you don't usually see fluids doing "should" be enough to pique your interest (if you're into these sorts of things.)
Slampropp 2 weeks ago
@jagara1 The surface tension disappears. I have no degree and was able to grasp it. You can see it happen.
DubIDubblix 1 week ago
@DubIDubblix Thank you so much for your explanation!
Can you please now explain what surface tension is?
Why when surface tension present a liquid behaves the way it does and why when it is not present the liquid behaves differently?
"Seeing something happen" is a whole order of magnitude in difference to understanding and being able to explain why it happens!
jagara1 1 week ago
@jagara1 You need to do some reading to understand surface tension. No one here knows how much you do or do not know already nor could we explain it to you without that knowledge. Hell, Wikipedia should have a long article that can answer your questions.
DubIDubblix 1 week ago
@DubIDubblix What a frickin' copout!
jagara1 1 week ago
@DubIDubblix I asked two questions and you are completely unwilling/unable to answer either of them!
jagara1 1 week ago
@jagara1 Hahahaha. I'm not your teacher nor do I owe you anything. Be proactive and go find the answers yourself. You're already signed into Google, try going to their homepage and typing in your question.
DubIDubblix 1 week ago
@DubIDubblix You said - "The surface tension disappears. I have no degree and was able to grasp it." - I just skimmed through the wiki on surface tension and am most impressed that you understand this area given the molecular and mathematical complexity of surface tension. It does not answer how when surface tension disappears that a liquid will flow up vertically though.I don't think you understand the slightest thing about this area which is why you have fobbed me off with visiting the wiki
jagara1 1 week ago
@jagara1 You misunderstand. I don't care if you understand it. I learned surface tension in high school and while the math is complex, I didn't have problems understanding it. Its not my problem that you don't get it.
DubIDubblix 1 week ago
That video is so cool thanks alot for this educational video.
I find this really fascinating aswell.
GenericCoder 1 month ago
Why do physicists have to have that hair?
synthprax 1 month ago
This guy is the typical professor.
amocrule1 2 months ago
Is it a liquid is it a gas is it something anyone cares about no.
MrFatdubyman 2 months ago
@MrFatdubyman obviously you're ignorant.
Asahiko2 2 months ago
Looks like he does sign language as the vehicle goes along.
Opballer24 2 months ago
So that's how the atmosphere on Venus is... Wow!
danielbluesmoke 2 months ago
omggggg thats cool
yourcathatesme 4 months ago
I recognize the professor's voice :)
Hydratic1778 5 months ago
I'm just studying this right now and I find this video very educational, besides the teacher (I imagine he's got a PhD or many) explains himself in a very understandable way. Thanks a lot!
DaarVanHoost 5 months ago 3
he sounds like salad fingers
ThrasherContinue 6 months ago 5
Marty, we gotta get back to the future!
itshelpa 6 months ago 6
@itshelpa ahh ahaha thats cold
rsdragon14 6 months ago
its kind of cool how you can have the liquid and gaseous co2 under the same pressure... If I could ask, what is the pressure in the containing vessel professor..?
eboueboy1122 7 months ago
what is the maximum p.s.i. in this demonstration? as well as the temperature in of the vessel Celsius?
threejchapman 8 months ago
Comment removed
x65535x 6 months ago
@threejchapman
The maximum pressure in this experiment is not higher than 75bar.
I have build such an apparatus and it gets supercritical at 31°C.
Flachzange1337 5 months ago
*Watching some videos about quantum mechanics*
*Found the nottinghamscience channel*
*Looks at clock- holy c***! 4:30 am already!?!*
That's how awesome science is...
cbader92 8 months ago 7
Supercritical fluids are awesome. Nice demonstration!
nodariel 9 months ago
I working on solubility of salts right now learning about Ks. So how would the Ks value change in supercritical solvents than in conventional solvents? If you could ask the professor.
BrootalMetalBanjo 9 months ago
Future mad scientist? He has the hair...
sal0212 9 months ago
Four people were suggested to go work with someone else.
sk8erguy552 9 months ago 2
I used to work with supercritical fluids. Turns out it was just a phasse I was going through.
giantsquidrule 10 months ago 157
@giantsquidrule HAHAHAHAHAHAHAHAHAHA fucking hi five
Maxpow33r 9 months ago
@giantsquidrule Oops. Mistyped it. Too late now.
giantsquidrule 9 months ago
@giantsquidrule i guess you parents stuck you in a sealed room
wazscience 4 months ago
@giantsquidrule I too used to work with superfluids like you. Then I took an arrow to the knee.
TheShnag 1 month ago 2
@giantsquidrule i loled
droopy1592 1 month ago
what are the pressures this is happening at?
killernat 10 months ago
@killernat probably atmospheric pressure, so 1003 hPa
wannabeers 9 months ago
@wannabeers oh right i think he mentioned its SF6 at some point so yah the pressure would be decently low
killernat 9 months ago
mit der frisur würde ick och schlau aussehn :D
RebelOfTheTruth 10 months ago
"Because I have nowhere else to put it"
LOL
vc821030 10 months ago 61
Nigga's the next Einstine
Idontknowuifyourgay 11 months ago
i had an interview today at professor Poliakoffs office!
fortunately i allready knew this video ;) i totally freaked out when he showed me the machine
Biotektan 11 months ago
why freaking youtube people doubting the words of a professor. OO
If u think u are better than him, prove it. ANd not be a keyboard warrior
daredevil890 11 months ago
thumbs up if you came to look at this after looking at phase diagrams in chemistry
msleslieee 1 year ago 3
CARBON DIOXIDE IS NOT POISONOUS???
This is really unexpected and perhaps unwelcome information coming from the mouth of a professor!
I understand that It's a matter of formulation but still... not from a professor, for crying out loud!!!
yo6ial 1 year ago
@yo6ial CO2 is not poisonous, literally. i mean it is for human beings and most animals but not for plants and that's only one example. the professor is correct when saying that.
jessenloner 11 months ago
Comment removed
ericon52168 11 months ago
Comment removed
ericon52168 11 months ago
@ericon52168 I'd imagine that I have a pretty good idea about what poison and poisonous means.
But, to my shame, I have no idea, whatsoever, about "meh" and "nvm" words are and, genuinely, no clue about what's that you're trying to say with "*headdesk*"
I'm afraid you have a pretty high CO2 concentration in your blood stream. :|
yo6ial 11 months ago
@yo6ial alright, my bad being an ass
but do you really think CO2 is poisonous ?
ericon52168 11 months ago
@ericon52168 I should probably say something like "I don't know... What _do you_ think?" ;))
But I won't.
Think that supercritical carbon dioxide fluid would be used in fabrication of some prosthetic.
As a simple solvent, as the professor explained.
That carbon dioxide would either be removed completely before implantation or it will be discarded into the patient's organism.
Now, please read the wiki article Carbon_dioxide#Toxicity
Cheers! :)
yo6ial 11 months ago
@yo6ial i went to that page just after seeing your 1st message
in my mind, it still doesn't count as a poison
you can also harm with oxygen or water, if enough is present, you can wiki "oxygen poisoning" and "Water intoxication"
but does that mean oxygen and water are "poisons"?
my definition of poison, and i think this is what people mean poison all the time
is a subtance that can react within the body and thus stopping vital functions (such as CO binding to hemoglobin, cutting O2 supply)
ericon52168 11 months ago
@ericon52168 Entirely true, :) but carbon dioxide can do just as much harm as carbon monoxide, even if different processes occur.
Even if the CO2 binds differently to hemoglobin and not actually displacing the O2 from it, it still severely decreases the amount of oxygen that can be transported.
Any chemical compound or element can be considered as poison/poisonous if small amounts can cause severe organism malfunction.
But I whose talking about a formulation issue. CO2 is not lethal in 2ppm.
yo6ial 11 months ago
@yo6ial i would like to see a diagram describing how CO2 interfer with O2 supply
anything reaching-mechinism-ish will do
ericon52168 11 months ago
@ericon52168 Ok... I'll try. :D
CO2 is mostly stored as HCO3 ions, in the bloodstream, but excess will cause acidosis .
The increasing levels of HCO3 can only compensate.
Acidosis is a cause for hypoxiation of blood.
I'll also try to find out more about the chemical mechanism of low pH and oxygen transportation, but I suspect that it might have to do with Fe ions... :|
yo6ial 11 months ago
His hair is a supercritical fluid : D
stephnicity 1 year ago
lol now everyone that wants to work in his lab knows exactly how they should react to that video
beatboxidontstop 1 year ago
4 people are supercritical
Brunovskist 1 year ago 3
that was the cooles experiment I've ever seen
poelfkat 1 year ago
great qualification gage. "whats that?" It is an interest gage.
captkirkconnell 1 year ago
"carbon dioxide is totally non-poisonous" ... Really, Professor? Is that why we have to remove it from our bodies metabolically or we die?
MrMZaccone 1 year ago
What will this look like in zero gravity?
madjimms 1 year ago
@madjimms
well I have not been in space yet.. But I'd think that the liquid would coat the glass container it is in... since its a gas and has zero viscosity. if the liquid was supspended away from the glass container, I'd think when heated the suspended ball of liquid would cloud up with bubbles and emit a layer of steam around it . the layer of steam would expand until there was no more liquid left.. after that you should have a perfect layer of helium condensation on the glass container.
drewschkelton 1 year ago
Actually you can die of CO2 poisoning even if there is sufficient oxygen along with it.
MazeleyFanClub 1 year ago
@MazeleyFanClub
thats if you breath it in
muhammadyousuf1 1 year ago
Please live long! I want to work with you so badly! Sadly though, I must first get a piece of paper confirming that I am smart enough to do so... a couple years left to go!
GilHeron 1 year ago
I was already been told what supercritical-fluid was, but those explanations where much more clear to me !
Thanks !
DeFliegendeHollander 1 year ago
I would say wowww
q3tt3smen 1 year ago
WITCHCRAFT!
deo000000 1 year ago
@deo000000 ALCHEMY! this experiment was possible 200 years ago? maybe.
monsieurdewpoint 9 months ago
Brilliant! Can I work for you now?
phoenixflames44 1 year ago
CO2 is hazardous in a sufficiently high concentration.
Gammaclipper 1 year ago
@Gammaclipper As an asphyxiant, not as a poison. You would die by breathing pure CO2 for 5 minutes, but because your cells would not receive oxygen, not by poisoning. Just like you wouldn't die by poisoning if someone was choking you.
DevilMaster 1 year ago
@DevilMaster
Actually @ 1% people will start feeling drowsy
Staying @ 2% for several hours causes acidosis
@ 3% breathing rate is 2X
@ 5% breathing rate is 4X normal and the concentration becomes directly toxic
Symptoms of high or prolonged exposure to carbon dioxide include headache, increased heart rate, dizziness, fatigue, rapid breathing, visual and hearing dysfunctions. Exposure to higher levels may cause unconsciousness or death within minutes of exposure.
Gammaclipper 1 year ago
@Gammaclipper
CO2 has been used to slaughter animals in some experiments to determine a new method of execution but hypoxia induced by nitrogen asphyxiation was found to be less painful.
Gammaclipper 1 year ago
How can you not like this video? They're just supercritical people!
kkonstantinosss2 1 year ago 2
3 people didn't like this video?
must be the 3 he suggested work with someone else. lol
nyyght7 1 year ago
cool!! can i make that thing?
MidnightRedemption 1 year ago
thats so awesome :D
killernat 1 year ago
oh god...that is so awesome!! i loved the little "storm" in there...i was just like O.O ...i really love supercritical fluids from now on..i just have to go and get some info's about it!!
Defonthana 1 year ago
@Defonthana ahh...is every fluid able to be supercritical? or do they need specific attitudes?
Defonthana 1 year ago
@Defonthana Yes, providing it is stable and does not decompose at the critical temperature and pressure, every substance can be made supercritical. For instance, some of the very efficient power generation plants use supercritical steam.
ib9rt 1 year ago
1:30 - so technically this is cold plasma?
Fusurugi 1 year ago
@Fusurugi No. Plasma is ionized gas.
DevilMaster 8 months ago
That's the same monitor I use :) Interesting effect too.
Direkin 1 year ago
This is my idea of nirvana:To see videos of sixty symbols, nottingham science and periodic videos with videos from the khan academy and it is even better if the professor is featured
homousios 1 year ago
i was never interested in chemestry (more biology) till i watched these videos. i find it so facinating
ChrisBclips 1 year ago
I wonder how it would look without the influence of gravity.........
grfiuonegrbi34809 1 year ago
I wonder how it would look without the influence of gravity.........
grfiuonegrbi34809 1 year ago
Fascinating!
dondude69 1 year ago
this is absolutly FASCINATING!
ChrisBclips 1 year ago
Now I less than three supercritical fluids.
UncleKennybobs 1 year ago
Prof...great experiment...i like it...:D
FelipeZucchetti 1 year ago
Einstein! in the flesh! :D
bone009 1 year ago
They should do research on his hair.
mlcoo17 1 year ago 2
@mlcoo17 You need to see the video where they etch a periodic table on one of his hairs. watch?v=cQU2IAsQak8
DevilMaster 8 months ago
quite interesting
Nopiw 1 year ago
So awesome!
CarpeMetus 1 year ago
When I study this, reading a book, I didn't know exactly what the book was telling me... Now i'm so surprized. This is much more i thought It was
mvszao 1 year ago
zomg its isac newton from the dead!!!
crud41 1 year ago
This comment has received too many negative votes show
gay
nassermaz1 1 year ago
crazy einstein hair + ginormous glasses = instant smart cred
ayoyoayoyo 1 year ago
You have to watch this old video on Liquid Helium Superfluid. watch?v=S3O-5KTYq6o
pauldve 1 year ago
It's cool to find out what struck him as fascinating and cultivated his chemistry passion.
pepsibookcat 1 year ago
Great explanation! Very clear.
pepsibookcat 1 year ago
This same process is used to make decaf coffee.
HaT223 1 year ago
I just would love him to be my Physics teacher... tha was awesome 0.o
KrokFryedRyce 1 year ago
I thought, if you breath and hold the breath until you feel bad, the CO2 made you to. It is poisonous if it's concentration is too high..
101status0 1 year ago
I know what you mean, but it is not POISONOUS. Cabon Monoxide is poisonous, because it harms the body, but what he is saying is it's not like 'OMG there's a giant cloud of CO2 coming to eat mee!!', so its safe :)
KrokFryedRyce 1 year ago 2
What 'e said. It's when the CO2 REPLACES the oxygen (as it does when you hold your breath) that you get into trouble.
restcure 1 year ago
ok he talked about CO2 as a solvent for some medicament- so the concentration of CO2 will be low in the blood. In this case it is non poisonous, until it's given in the right dose.
Giving too much= poisonous. The same like CO or CO2 coming out of the ground.
101status0 1 year ago
@101status0
CO2 can be toxic. Toxins and not necessarily poisons.
Poisons are detrimental at any dose. Toxins are detrimental at high dose.
jmiklavc 1 year ago
@KrokFryedRyce I lolled when you said "'OMG there's a giant cloud of CO2 coming to eat mee!!', so its safe :) "
5secLAUNCH 1 year ago
I would have expected this as part of a physics demonstration, we're seeing physical properties of phase-changes that are done and undone by physical means.. Was this experiment initially discovered performed by a physicist?
Why is it called a Super-critical Fluid, rather than a Super-dense Gas? Does the Super-critical Fluid have more properties related to fluids than gases? Is CO2 condensed to make this since at room temperature it's a gas already?
Ducky1138 1 year ago
@Ducky1138 You appear to be unclear on the definition of fluid. In common speach they are often used interchangably but there is technically a difference.
Simply put, a fluid can be any material which can flow, which includes gasses as well as liquids. The critical point is the point on a pressure/temperature graph at which the transition from two distinct phases (liquid and gas) to a single phase (as shown in the video) occurs. As this exists above that point it is called super-critical.
Fish12002 1 year ago
he looks like the archetypical mad scientist
guzzlinsoda 2 years ago 3
What do you mean it's too dangerous!? There's no such thing! HaHAhahahahahaha!
Postscript624 1 year ago
This is an absolutely fascinating effect. It would be even more interesting if we tried this as a plasma in this kind of environment, it's stuff like this that makes me want to be a chemist O_o
omegahunter9 2 years ago
This guy's my hero!
punishedexistence 2 years ago 4
pssssh!!
Paxmax 2 years ago
That was interesting.
c4clive 2 years ago
Does surface tension play a role in the "storm"? I did see more water stayed up on the sides of the container before "raining" down.
safibn1 2 years ago
My reaction would be Wow! Unfortunately my next reaction would be Derrrr?
chrisofnottingham 2 years ago
Wow that's interesting (now I wonder if I can send in my resume)
kurtnelle 2 years ago
i got a friend called euan who wants a bifro like yours, but then he cut his hair off and grew a beard. RESPECT DUDE
fredthemighty 2 years ago
This comment has received too many negative votes show
Zoom in zoom out in out in out in out
Camera man quite suck
icegeforce 2 years ago
Whoa that cats got a pimpin' bifro going on. RESPECT.
pedalpusher2008 2 years ago
Martyn is my scientific idol.
guitar23man23 2 years ago 72
yea, we should start a fan club.
metalkraid 2 years ago 3
dude, yes. im completely serious too.
guitar23man23 2 years ago
awesome hair dude!!
mollygooch 2 years ago 68
Supercritical fluids form the harshest environments in the world. If you need to destroy a chemical or do wastewater treatment, it'll definitely do the trick...if the container lasts that is. Even high density stainless steel doesn't stand a chance for long. Containing the supercritical fluid while using it in an application is a very important problem to solve.
baguazhang2 2 years ago
@baguazhang2 you dont need to raise it to critical temperatures and pressures to clean out "bad" things. it can do that at a much lower temp than 300 degrees cel
skater0520 2 years ago
This comment has received too many negative votes show
Thanks for debunking the hoax of calling CO2 a pollutant. Evil global warners go to hell.
fabbio8888 2 years ago
Just because something isn't poisonous doesn't mean it can't hurt you. If you lock yourself in a room full of pure, non-toxic CO2 you'll not last long.
But you don't have to worry about the CO2 in the global atmosphere getting high enough to suffocate you, because the heat it traps will make the planet unlivable long before that.
dposton70 2 years ago
Sure, but you cannot use the word pollutant. Pollutant is for other stuff.
fabbio8888 2 years ago
Depends on your definition of a pollutant. It fits the common definition:
"Pollution: introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem"
But other groups only consider elements toxic to humans (such as Carbon Monoxide) to be pollutants.
But all this detracts from the main issue, large amounts of man-made CO2 (mostly from burning coal, oil, etc.) is causing the planet to heat up at an accelerated rate.
dposton70 2 years ago
Oh yeah it depends on definitions. But if you breathe CO2 for a long time then you stop, you have nothing bad left inside you. Try this with CO or with toxic substances. They will pollute your body.
The main issue was the word not the world. And it is an hoax.
I didn't talk about the global warming but about the global warmers and the incorrect use of a word.
Let's use pollutant for the nice metal dust you breath in several cities. It is polluting a lot of people just now.
fabbio8888 2 years ago 3
BTW CO is an impossible liaison
iSim0641 2 years ago 2
Wow. :)
Kikikuul 2 years ago
That's definitely a good start on solvent use. It'll save lots of time and money. Solvents go through grant money like a kid goes through a pack of gum. :)) Seperating and repurifying solvent is time consuming which slows down progress, and also happens to be tedious. Just looking at it though, you know there'll be a breakthrough for more practical applications.
GodspeedX 2 years ago
it's great!!i love it!
djolejovanovic 2 years ago
listen to the end!!
shazta88 2 years ago
For the people who dont see the benefits of this, you didnt watch to the end of the video. The professor explains a potential use.
DarthLlama226 2 years ago 2
in laparoscopic surgery, u need to expand eg the abdominal cavity temporarily; you use CO2 there n plenty more other uses
rinsedpie 2 years ago
what the significance of this? a cool experiment, but what does it show other than the obvious. what does this man research using this information?
kieranmccruden 2 years ago
Ha ha Albert Einstein hairdo!
Stumblefuck 2 years ago
you mean lack of hair care, right?
TheOneKingOfHearts 2 years ago
can someone please explain this to me? i just dont understand why its so awesome? is gas half the density of a liquid something huge? haha im sorry
jih128 2 years ago 2
The significance is from 3:43 to the end. Since you can use the supercritical fluid as a solvent instead of an inorganic solvent, it would be useful in medicine where an inorganic solvent introduced into an organism might be harmful, for example.
johnlebl 2 years ago 2
oh ok thanks
jih128 2 years ago
johnlebl - I don't see a useful application of this in medicine because living tissues will not survive the pressures at which these fluids operate.
oomblikkies 2 years ago
Sorry, oomblikkies, I guess I didn't explain what I meant very clearly. If you needed to use a solvent in the manufacture of a replacement body part, maybe a mechanical heart or pacemaker, then a supercritical fluid used as a solvent would be a better choice than say, benzene (random example) that might remain residually and leach out. No body tissues need be harmed by the pressure ;p
johnlebl 2 years ago
There are a ton of other applications as well. Like I just mentioned in my mast post, you can run wastewater through a supercritical fluid to destroy the bad things and get clean water. Supercritical water forms an extremely, extremely harsh environment.
baguazhang2 2 years ago
Does this apply to the weather? The reason why there are storms.
SkyBlue222222 2 years ago
I, for one, would constitute a part of the "Wow!" crowd of interviewees. :-)
leporidus 2 years ago
One little mistake in the vid: At 1:12, the professor says that "... eventually they become the same density, and the line in between it, completely disappears".
The two phases do not necessarily have to have the same density in order for the dividing line to disappear, but the same relative index of refraction. This is often demonstrated by sticking a glass spatula into a clear liquid of the same refracion index of the spatula: The part of the spatula that's in the liquid, becomes invisible!
AssemblerGuy 2 years ago
Yes, but in this case the materials are the same, so the indices of refraction will be the same exactly when the densities are the same. :P
drewmandan 2 years ago 3
Wow that is very fascinating.
RealmEternal 2 years ago
Can lower temperature supercritical fluids be used as lubricants, or as a suspension matrix for industries ? It would appear that they have a greater measure of "slipperiness"
Roddyoneeye 2 years ago
WOW
coolie121 2 years ago
I've done more exciting farts
however they were also supercritical fluids
JamesStJones 2 years ago
first time i saw this o got hoocked. this man has convinced me to become a chemist
akkuyuki 2 years ago
awesome! i love him!
roshanakmofidi 2 years ago 3
lol i totally passed that test, i was rivetd, and was all heart eyes when it recondensed :D
Sara2986 2 years ago 2
xD No offense.
taishoinu 2 years ago
Some questions: 1.What kind of a liquid could it possible have a supercritical temperature of about 60 C?
2. If the liquid is contained in a closed vessel, how come the boiling temperature does not increase with the vapor pressure of the liquid?
arboloco1 2 years ago
actually this one is kind of simple the atoms have no where to go while trying to move more, creating an expenonential growth effect temp wise, as the temp goes up the gas already, having no where to go the molecules rub and eventually do that =) (my guess)
phaloxxx 2 years ago
It *does* increase the pressure. In fact if you look at a phase diagram at the triple point you can see what the pressure will be. That's why you need to take the pressure into consideration for your vessel design strength.
jestertru 2 years ago
CO2 32ºC
liandr0 2 years ago
Very interesting! I was studying isothermal curves of a real gas, but I didn't understand them very much. I couldn't imagine a supercritical fluid and on my book there was written that it's impossible to see it. Thanks to my favourite chemist!
flozzalozza 2 years ago
This comment has received too many negative votes show
Dude, why do smart people have fucked up hair?
taishoinu 2 years ago
thanks
the5445 2 years ago
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laalillaa 2 years ago