2. In the process of free expansion of an isolated ideal gas, which statement is incorrect?
(A) The gas gets cooler.
(B) The gas does not do work.
(C) The gas does not absorb heat.
(D) The process is irreversible.
(E) The entropy of the system changes.
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統計: A(22), B(1), C(0), D(2), E(2) #3084461
統計: A(22), B(1), C(0), D(2), E(2) #3084461