39. A 30.0 g bullet shoot into an ice at speed of 2.4×102 m/s and stay inside. Assume the kinetic energy is transfer to thermal energy, and absorbed by the ice, what is the change in entropy of the ice?
(A) 86.4 J/K
(B) 27.0 J/K
(C) 31.6 J/K
(D) 2.7 J/K
(E) 3.16 J/K

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統計: A(7), B(0), C(5), D(8), E(42) #2356600

詳解 (共 2 筆)

#4163213
假定冰塊溫度不變,為273K則所求 = ...
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#4744606
delta entropy=Q/T
1/2x30x10^-3x240^2/273=3.16J/K
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