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HW7 - Department of Chemical Engineering University of...

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Department of Chemical Engineering ChE 110A University of California, Santa Barbara Winter 2010 Problem Set No. 7 Due: Wednesday, February 24, 2010 Objective : To understand and perform calculations involving the entropy and the second law of thermodynamics for closed, open, and cyclical processes. Note: Numerical values for some problems have been changed from those in the book. Problem 32 ( thought problem) A well-insulated container consists of two halves of equal volumes separated by a partition. On one half there an ideal gas with constant heat capacity, initially at g1846 g2868 . On the other, there is a vacuum. In process A, the partition is suddenly removed, and the gas expands to fill the volume. In process B, the partition is gradually moved to one side such that the gas expands slowly against the force of the wall. Note that in both cases g2012g1843g34040 . (a) What are the final temperatures after processes A and B, in terms of g1846 g2868 ?
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