An ideal gas is to taken reversibly from state i, at temperature T1, to any of the other states labeled I, II, III, IV, and V on the p-V diagram below. All are at the same temperature T2. Rank the five processes according to the change in entropy of the gas, least to greatest.
A. I, II, III, IV, V
B. V, IV, III, II, I
C. I, then II, III, IV, and V tied
D. I, II, III, and IV tied, then V
E. I and V tied, then II, III, IV
Answer: A. I, II, III, IV, V
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