080215_20_22 - A hot object is brought into contact with a...

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080215_20_22.pdf 1 A hot object is brought into contact with a cold object. The hot object’s entropy decreases by 1. 5 J/K as it comes into equilibrium with the cold object. By how much does the entropy of the cold object increase? A.More than 1.5 J/K <<< B.Less than 1.5 J/K C.Exactly 1.5 J/K D.0 J/K E.None of the above A sample of helium gas with an initial temperature Ti in a thermally insulated cylinder with initial volume Vi is suddenly and violently compressed to one-half its initial volume. The absolute temperature of the gas after the compression is observed to have doubled. (Recall that for a quasistatic adiabatic compression of a monatomic ideal gas that T[V^(2/3)]=constant.) A suitable replacement process to use for calculating the entropy change in this process would be A. A slow adiabatic compression from Vi to 0.5Vi B. Heating the gas to double its temperature followed by a slow abiabatic compression from Vi to 0.5Vi C. A slow adiabatic compression from V to 0.5Vi, followed by
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This note was uploaded on 04/08/2008 for the course PHYS 224 taught by Professor Fain during the Spring '08 term at University of Washington.

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080215_20_22 - A hot object is brought into contact with a...

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