View Full Version : energy req'd to compress a gas?
ProtoBob
Dec17-08, 07:12 PM
Hi, I am trying to figure out how much energy would be required to compress air from 100ml
volume to 50ml, and also to 25ml volume.....
A nudge in the right direction would be great!
Thank you! :)
Vanadium 50
Dec17-08, 07:17 PM
Work is force times distance. Pressure is force per unit area. Pressure times volume of a gas is a constant. Enough of a nudge?
ProtoBob
Dec20-08, 02:13 PM
So if the volume were initially 100 ml and the pressure is 14.7 psi then when compressed to 1/2 the volume, would the pressure then be 14.7 * 2 = 29.4 psi?
Dadface
Dec20-08, 05:34 PM
The answer will liie between two extremesThe minimum energy is when the gas is compressed isothermally [infinitely slowly ]and the maximum when it is compressed adiabatically[infinitely rapidly].
ProtoBob
Dec21-08, 08:44 AM
Could you explain isothermally and adiabatically?
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