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【单选题】
H 2 ( g )和 O 2 ( g )在绝热的钢瓶中反应全部生成液态水,体系温度升高,则( )A.
△ r H m =0
B.
△ r G m =0
C.
△ r S m =0
D.
△ r U m =0
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