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To: adamg@di*.co* (Adam Goldberg)
From: "John T. Crea" <johncrea@in*.co*>
Subject: Re: Thermal Conductivity
Cc: techdiver@terra.net
Date: Wed, 27 Dec 95 21:02:53 -0600 (CST)

At 04:18 PM 12/27/95 -0800, you wrote:
>
>> >In the recent past several months. someone posted a list of thermal 
>> >conductivities of helium, argon, air, et al. I can't find my list. Please 
>> 
>> Here are the thermal conductivity valves from the CRC handbook of Chemistry
>> and Physics  (values are listed at 80 degrees F):
>> 
>> Air      =  62.20   
>> Argon    =  42.57
>> CO2      =  39.67
>> Helium   = 360.36 
>> Hydrogen = 446.32
>> Neon     = 115.71
>> Nitrogen =  62.40
>> Oxygen   =  63.64
>> 
>> See the CRC Handbook of Chemistry and Physics, page E02.
>
>Hmmm.  Then why use Argon--why not CO2?
>
>Adam
>
>-- 
>"What?  No Geek Code!"
>
Adam,

CO2 has the better thermal conductivity, but it also combines with water.
sweat, etc. to produce carbonic acid.  Although this is a fairly weak acid,
I do not think I would like to have an acid in contact with not only my skin,
but my drysuit underwear, the inside of my drysuit, etc.

John

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