[TheForge] Argon-CO2 mix question

[Bruce Freeman]

No, they won't sort themselves out.  They don't need to be bonded chemically to remain mixed.  That's the nature of gases.  Once mixed, it takes work to separate them.  

All bets are off if a phase change occurs, though.

Bruce
NJ

>>> craig.schaefer at verizon.net 6/5/2007 10:45 AM >>>
Why do you say 'impossible'?   They are not bonded chemically, and since the two gasses have different weights, couldn't they sort themselves out?  On the other hand, I would think that just opening the valve to release the gas would mix up the insides pretty well.

CraigS



>From: Bruce Freeman <freemab222 at yahoo.com>
>Date: 2007/06/04 Mon PM 08:59:17 CDT
>To: Craig Schaefer <craig.schaefer at verizon.net>, 
	Sponsored by ABANA <theforge at mailman.qth.net>
>Subject: Re: [TheForge] Argon-CO2 mix question

>If the argon and CO2 exist as gases in the cylinder,
>then separation is impossible.
>
>However, CO2 may exist at that temperature and
>pressure as a liquid, in which case separation is
>possible.
>
>I would guess that in formulating the Argon-CO2
>mixture, this possibility was accounted for, and
>somehow rendered irrelevant.  
>
>However, to be sure, you'd have to talk to a technical
>man at the gas supplier.  I don't mean the local
>welding supply store, but someone back at the
>headquarters of the company - like AirGas, MG, etc. -
>that does the gas blending.
>
>Bruce
>NJ
>--- Craig Schaefer <craig.schaefer at verizon.net> wrote:
>
>> I just read on another forum that someone suggested
>> that over time, argon 
>> and CO2 might tend to stratify (separate) in the
>> cylinder.  Has anyone ever 
>> heard of this?   This is news to me, but I could
>> have had my head in the 
>> ground over the past 30 years or so.....
>> 
>> CraigS
>> Gresham, OR 
>> 
>> 
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