Liquid Oxygen Formation

eCHEM 1A: Online General Chemistry
College of Chemistry, University of California, Berkeley
chemistry.berke...
Curriculum and ChemQuizzes developed by Dr. Mark Kubinec and Professor Alexander Pines
Chemical Demonstrations by Lonnie Martin
Video Production by Jon Schainker and Scott Vento
Developed with the support of The Camille & Henry Dreyfus Foundation

[@oceanwong4906]

1:53 We can get a close up...
2:09 The close up...
2:57 (finally close up)
Should fire your cameraman.

[@sgvpotter]

so now i ask... how do you make liquid nitrogen, will nitrogen gas explode if there was a match there, how do you keep the liquid oxygen liquid without refrig or in pressure tank?

[@cjack56]

Nitrogen is an inert gas. It won't explode even if you provide a spark or other ignition source. The liquid Oxygen will stay there until it absorbs enough heat to turn back into a gas.

[@NOName-uo2nt]

Nice

[@lewipetrik8641]

where is your personal protection equipment?

[@TammyDenseDdank5658]

+Lewi Petrik He doesn't need one. Hes batman.

[@lewipetrik8641]

+DenseD Dank LOL.

[@DuyNguyen-vf5cv]

can we pass air through it( not pure oxygen) and only oxygen is condensed??

[@ChristmasEve777]

Nitrogen gets condensed along with it but you'll get a LOT more liquid oxygen. I'm guessing the reason a gas can be condensed by the SAME gas being boiled is because boiling is a cooling process. When the liquid nitrogen evaporates, it absorbs heat from the environment because it leave the slower moving molecules behind. So, you'll get a mixture.

[@WaterPython]

So as liquid oxygen Flows

[@PeterPete]

Good demonstration. How come you never got the oxygen from the air?

[@stuartschindler9435]

You can but it would be a mix of atmospheric gasses which would be less impressive for the demo

[@PeterPete]

@@stuartschindler9435 Well I'd disagree with the air being a mix of gases because atmospheric air in my opinion is oxygenless, nitrogenless, argonless etc., but air defintiely contains water vapour/gas. You can make oxygen, nitrogen and the other gases you think are constituents of the air though by processing the air via specific processes like PSA. The gas contained in his green gas cylinder is processed, concentrated air (aka oxygen). Welcome to man's fabricated world where man fabricates your perception of the natural environment!!

[@Teaquamarine]

@@PeterPete I would like 5 grams of whatever weed youre smoking

[@PeterPete]

@@Teaquamarine hey! I gave up smoking years ago now but I'm still having trouble finding the oxygen as a constituent of the air. Got any ideas what I can do to prove oxygen is in the air??
And please explain why your idea proves oxygen is in the air!
I'll eagerly await your reply!

[@1000selva]

Pls Answer my question which object need to burn to obtain oxygen

[@aggabus]

77° 90°

[@MrArcticShadow]

Wouldn't it be easier to get the liquid oxygen if the flask was put in a vacuum? You would waste less liquid nitrogen too.

[@aggabus]

196÷183=6%.?
He 452

[@goldengunization]

can u extract essential oils with liquid oxygen?

[@AZURA888]

throw gasoline to liquid oxigen and CABOOM!!.

[@yichengquan7956]

Why does the narrator pause so awkwardly when he is talking?

[@yichengquan7956]

Lol ikr

[@pepelepew2142]

OK LET'S SEE THE MATH 2+2=5 FOR 5 GALLONS WASTED OF NITROGEN I GET 5 OUNCES OF LIQUID OXYGEN?

[@jamalcollier5339]

This experiment looks quite ineffective

[@pillepolle3122]

man that thing would be great to smoke weed

[@aggabus]

Doer or donter

[@aggabus]

176 90 183 86