Liquid Air - Science Theater 31

Liquid air? Once Nitrogen gas becomes really, really cold it becomes a liquid. Once you have really, a really cold liquid, you can use it to make other things cold. Really, really cold things behave differently. Join Dr. Carlson to find out how cold things behave in... "Liquid Air".

Category:

Education

Tags:

• cold
• gas
• liquid
• nitrogen
• phase
• change
• physics
• science
• chemistry

[MrMrgta4000]

why isnt the liquid nitrogen turning back to gas ,, i think its 20 C around it ,, and it need much less tempretior to turn to gas ???

please answer my question and thanks .

(srry for my bad English) .

[sciencetheater]

@MrMrgta4000 Your English is fine. The liquid nitrogen IS turning into a gas... it just isn't happening all at once. (It takes time for an ice cube to melt, and it takes time for the liquid nitrogen to evaporate or boil off...) Every time I put something into the liquid nitrogen to cool off, a portion of the liquid nitrogen boils off and becomes air again...

[62564narah]

omg,with ur videos...i actually find physics and chemistry interesting,ive been studying this subjects for 2 years,and i hv not find even a second this concepts to be interesting! thx to u i might just get an A for my exam this november..! :)

[sciencetheater]

@62564narah Thanks for the nice comments.

[sciencetheater]

@62564narah Thanks for the nice comments.

[DoNotuseEbid]

Do you need an expensive machine to freeze gas to -217? I want to turn hydrogen to liquid hydrogen.

[sciencetheater]

@DoNotuseEbid I don't think it's too cheap... liquid nitrogen isn't too bad, and dry ice (solid CO2) is doable, but I'm not so sure about going much farther easily...

[DrewZZK]

I'm learning!

[th55]

Fun stuff

[oribitton1]

nice

[Lachieh923]

completely opposite to my penis, when its cold it goes soft and when its hot it goes hard

[MrMrgta4000]

@sciencetheater oh .. thank you very much :D !

[EngNaruSuks]

@sciencetheater

Thanks for the nice video!

[dreammaker182]

...Hand Gestures...