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Phys. 369, Fall 2009
Homework #7
Due: Friday, Oct. 23, beginning of class
100 points total
1. (12 points) Schroeder, problem 4.30
2. (12 points) Schroeder, problem 4.33
3. (14 points) Suppose that you have 1 liter of
4
He gas at a temperature of 600 K and a pressure
of 3 atmospheres.
a) For this system, compute the internal energy
U
, enthalpy
H
, Helmholtz free energy
F
, and
Gibbs free energy
G
.
b) Suppose now that the gas expands quasistatically and isothermally to a volume of 3 liters.
Calculate the work done by the gas, the heat absorbed by the gas, and the change in entropy of
the gas. Verify that the work done is equal to the magnitude of the decrease in the Helmoltz free
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This note was uploaded on 11/06/2010 for the course PHY 369 taught by Professor Staff during the Fall '08 term at University of Texas at Austin.
 Fall '08
 Staff
 Thermodynamics, Work

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