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) 不可逆绝热恒外压膨胀,到达相同体积 V 2 ,则 ( )
A.
ΔU 1 >ΔU 2 , ΔH 1 2
B.
ΔU 1 2, Δ H 1 2
C.
ΔU 1 >ΔU 2 , ΔH 1 >ΔH 2
D.
ΔU 1 2, Δ H 1 >ΔH 2
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