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Unformatted text preview: n process to cool a real (non-ideal) gas, what
must the sign of µJT be?
v. Derive µJT for a gas obeying the van der Waals equation of state to leading order
in the density N/V . For what values of temperature T can the gas be cooled?
2 5. A (non-ideal) gas has constant heat capacities CV and Cp . Using the results of
Question 2, show that its equation of state can be written as
(Cp − CV )T = (p + a)(V + b)
where a and b are constants. Show also that E is of the form E = CV T + f (V ), ﬁnd
f (V ) and calculate the ent...
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This document was uploaded on 03/03/2014 for the course DAMTP 1110 at Cambridge.
- Spring '14