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【单选题】
下列反应中, r H m 与产物的 f H m 相同的是A.
P( 红 ) = P( 白 )
B.
N 2 (g) + 3/2H 2 (g) = 2NH 3 (g)
C.
2H 2 (g) + C( 石墨 ) = CH 4 (g)
D.
NO(g) + 1/2O 2 (g) = NO 2 (g)
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