[TheForge] Argon-CO2 mix question

[Bob Willman]

Carbon dioxide will go directly from a solid to a gas at atmospheric
pressure. At some pressure/temperature it will be a liquid. 


Bob Willman
Bowling Green, Ohio
The Eagle's Anvil
WB8NQW

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Jerry Smith
Sent: Monday, June 04, 2007 10:04 PM
To: Sponsored by ABANA
Subject: Re: [TheForge] Argon-CO2 mix question

Bruce,

Maybe I missed some in college chemistry 101, but I thought CO2 could only
be a gas or a solid, maybe I am wrong. 

Jerry

--- Bruce Freeman <freemab222 at yahoo.com> wrote:

> 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

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