How much gas is in a pound of CO2?

[SteveD2]

I know there must be some kind of calculation for this. Does anybody know how I might find out exactly how many cubic feet/gallons/liters of gas at a certain pressure that you can get from a pound of CO2? More specifically, I'd like to know how many gallons of 100psi gas are in a pound.

 

[motorguy222]

Try this site

http://www.csgnetwork.com/automotiveconverters.html

It may have something,you will have to look at the several choices.

 

[1 FMF]

PV = nRT
weight = mass * gravity

find out molecular weight of CO2, find out how many moles I think are in a pound, back it out thru the gas law. You also have to specify a temp.

1 ft^3 = 7.480519 gallons

1 litre = 0.2641721 gallons

 

[SteveD2]

quote:

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Originally posted by 1 FMF:
PV = nRT
weight = mass * gravity

find out molecular weight of CO2, find out how many moles I think are in a pound, back it out thru the gas law. You also have to specify a temp.

1 ft^3 = 7.480519 gallons

1 litre = 0.2641721 gallons

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Wish I knew what a mole, and the gas law is.

 

[Shannow]

ZmOz,
CO2 has a molar weight of 44 grammes.
A pound is 454 grammes, so you've got 10.3 moles.

At Standard Temp and Pressure, that's 231 litres, or nearly 61 gallons (US).

If the 100psi is guage (i.e. 100psi above atmosphere), the volume is just under 8 gallons.

 

[mormit]

ZmOz: Just what are you trying to do?

Carbonate your homebrew with dry ice???

I find that a tank of CO2 with the regulator set to 30psi can get cold beer carbonated in a day. Just shake the keg every hour or so.

 

[SteveD2]

quote:

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Originally posted by Shannow:
ZmOz,
CO2 has a molar weight of 44 grammes.
A pound is 454 grammes, so you've got 10.3 moles.

At Standard Temp and Pressure, that's 231 litres, or nearly 61 gallons (US).

If the 100psi is guage (i.e. 100psi above atmosphere), the volume is just under 8 gallons.

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Perfect...thanks.

quote:

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Originally posted by mormit:
ZmOz: Just what are you trying to do?

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Trying to figure out how large of a CO2 tank I want to fill tires.

 

[mormit]

quote:

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Originally posted by ZmOz:

Trying to figure out how large of a CO2 tank I want to fill tires.

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Fill them with neon...... Bling, Bling!!!!

 

[Bob Woods]

I know about using nitrogen to fill tires on airplanes and racecars. But CO2 never.