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Q: Solubility of oxygen, nitrogen and hydrogen in liquid CO2 ( No Answer,   5 Comments )
Question  
Subject: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
Category: Science > Chemistry
Asked by: silentt-ga
List Price: $20.00
Posted: 20 Nov 2006 14:00 PST
Expires: 20 Dec 2006 14:00 PST
Question ID: 784329
What is the solubility of oxygen, nitrogen and hydrogen in liquid CO2
at room temperature under its own vapor pressure?
Answer  
There is no answer at this time.

Comments  
Subject: Re: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
From: ansel001-ga on 22 Nov 2006 00:37 PST
 
Under normal conditions carbon dioxide does not exist in the liquid
phase it sublimates directly from solid to gas.  Hence, solid carbon
dioxide is called "dry ice."
Subject: Re: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
From: silentt-ga on 23 Nov 2006 04:18 PST
 
When stored under its own vapor pressure (58.5 bar at 20C) it's liquid.

http://encyclopedia.airliquide.com/images_encyclopedie/VaporPressureGraph/Carbon_dioxide_Vapor_Pressure.GIF
Subject: Re: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
From: david88888888-ga on 30 Nov 2006 04:07 PST
 
When CO2 stored under its own vapor pressure (58.5 bar at 20C) it's
liquid, which is called Supercritical Fluid.
When commixed, H2 and/or O2 can be solved in CO2 in any ratio, whether
in supercritical or compressed condition. It's a general knowledge, so
you can hardly find any document.
Subject: Re: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
From: david88888888-ga on 30 Nov 2006 04:10 PST
 
When CO2 stored under its own vapor pressure (58.5 bar at 20C) it's
liquid, which is called Supercritical Fluid.
When commixed, H2 and/or O2 and/or N2 can be solved in CO2 in any
ratio, whether in supercritical or compressed condition. It's a
general knowledge, so you can hardly find any document.
Subject: Re: Solubility of oxygen, nitrogen and hydrogen in liquid CO2
From: orent-ga on 30 Nov 2006 07:44 PST
 
CO2 is not solid under its own vapor pressure.

CO2 is not supercritical either, unless the temperature exceeds 31.1C. 

It's in equilibrium between liquid phase and vapor phase, just like
butane in a cigarette lighter.

And it is not guaranteed that hydrogen, nitrogen and oxygen will
remain dissolved in the liquid CO2. They might prefer to evaporate
into the gaseous CO2 than remain in solution.

Are there any actual chemists among the google answers researchers or
do I need to look elsewhere?

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