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080208_11_13

# 080208_11_13 - The entropy of a certain macropartition is...

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080208_11_13.pdf 1 The entropy of a certain macropartition is 102k, where k is Boltzmann's constant. The entropy of another macropartition is 204k. How much more likely is the system to be in the second macropartition than the first? (Select the answer closest to correct.) A. 2 times B. e 2 = 7.4 times C. 10 2 = 100 times D. e 102 ~ 2 x 10 44 times << E. e 102k ~ e; the two macropartitions have close to the same probability A hot object is placed in contact with a cold object. The objects are isolated from their environment. Heat is observed to flow spontaneously from the hot object to the cold object, but not in the other direction. Why does this happen? A. This increases the entropy of both objects.(A clearer wording would be: This increases the entropy of the hot object and of the cold object.) B. This decreases the entropy of the combined system. C. The system will tend to evolve toward macropartitions that have more microstates.<< D. Both A and C E. Both B and C

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080208_11_13.pdf 2 Consider a container holding a million helium molecules at 300 K. If we double the gas's temperature to 600 K
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