PHYS664_HW7 - pressure p . The vessels are brought into...

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Robert Szoszkiewicz, PHYS 664, HW # 7, Nov 3, 2009 DUE: on (or before) 10:20 am, Wed, Nov 11, 2009. 1. Entropy change in mixing Two vessels contain the same number, N , of molecules of the same perfect gas. Initially, the vessels are isolated from each other. A . Suppose, the gases are at the same temperature τ , but at different pressures, p 1 and p 2 , respectively. The vessels are brought into contact (allowing for exchange of particles and temperature) for enough time that an equilibrium (thermal and diffusive) is reestablished. Find the change in entropy of the system (when equilibrium is reestablished) in terms of initial p 1 and p 2 . Show that this entropy change is non-negative. B . Suppose, the gases are at different temperatures τ 1 and τ 2 respectively, but at the same
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Unformatted text preview: pressure p . The vessels are brought into contact (allowing for exchange of particles and temperature) for enough time that an equilibrium (thermal and diusive) is reestablished. Find the change in entropy of the system (when equilibrium is reestablished). Show that this entropy change is non-negative. 2. Thermal Pollution Chapter 8, problem no. 5, page 258 from the course book (Ch. Kittel, Thermal Physics, second ed.) 3. Room air conditioner Chapter 8, problem no. 6, page 258 from the course book (Ch. Kittel, Thermal Physics, second ed.) 4. Irreversible expansion of a Fermi gas Chapter 8, problem no. 10, page 259 from the course book (Ch. Kittel, Thermal Physics, second ed.) 1...
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This note was uploaded on 10/09/2010 for the course PHYS 664 taught by Professor Robertszoszkiewicz during the Spring '10 term at Kansas State University.

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