Physics 133
Spring Quarter 2004
3 May 2004
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The quiz is due before class today, 3 May 2004.
Explain what happens a gas is compressed. How could one calculate the work done on the gas by the force? Express your answer in terms of macroscopic variables such as temperature, pressure, volume, etc.
Gordon’s solution will appear here
To compress a gas, you have to do something like pushing a piston. In doing that you do work on the gas, increasing the energy of the gas. Since the work is given by
dW = F ° dr = Fperpendicular dr = (Fperpendicular/A) (Adr) = p dV.
We have to calculate this integral. The ideal gas law, pV = NkBT = nRT can help us figure out what the integral is in various cases.
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