At 01:49 PM 2/17/00 +0000, Gliviak, Jozef wrote:

>- Carbonic acid (H2CO3) is one of the weakest acids and it is quickly
>decomposed to H2O and CO2.

True, it will establish an equilibrium and the acid it too weak to ruin 
your underwear / Thinsulate.

>- Gas in your suit is very dry which will cause that your skin is quicky
>dried when sweated.

Wrong, the gas you inflate the suit with is very dry but your presence 
within the suit makes the gas humid.

>- Water vapour condenses on place with highest temperature gradient - which
>is shell of suit, not the skin

It does, but there's plenty of moisture close to your skin as well, 
especially where your sweat glands are located.

>- We actually like to drink this acid which is in any soft drink which is
>carbonated and it didn't burn our throat
>So I'm not sure if acid is the cause why CO2 is not widely used.

Well, if you want to try "ants in your pants" and itchy armpits, try 25% 
CO2 at 200'. At first it provides a false sense being warm -- then you 
realize it's a burning sensation. It's not dangerous in the sense of 
causing any permanent damage but it sure itches. Fizzing carbonated drinks 
may taste fresh but I can assure you fizzing private parts are less enjoyable.

Some CO2 (15%) at moderate depths is OK.


regards,

Hans

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