試題詳解

10. A hot object and a cold object are placed in thermal contact and the combination is isolated. They transfer energy until they reach a common temperature. The change △S_h in the entropy of the hot object, the change △S_cin the entropy of the cold object, and the change△S_ioiai in the entropy of the combination are:
(A) △S_h > 0,△S_c>0, △S_totai ＞ 0
(B) △S_h<0，△S_c> 0, △S_ioiai= 0
(C) △S_h ＞ 0, △S_ci<0 ,△S_ioiai=0
(D)△S_h> 0, △S_c<  0, △S_ioiai>0
(E) A△S_h＜0, △S_c＞ 0, △S_ioiai＞ 0.