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【单选题】
理想气体从同一始态 ( p 1 , V 1 ) 出发经 (1) 可逆绝热膨胀和 (2) 不可逆绝热膨胀,到达相同体积 V 2 ,则 。A.
Δ U 1 >Δ U 2 Δ H 1 H 2
B.
Δ U 1 U 2 Δ H 1 H 2
C.
Δ U 1 >Δ U 2 Δ H 1 >Δ H 2
D.
Δ U 1 U 2 Δ H 1 >Δ H 2
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