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【单选题】
下列反应中，ΔrSmΘ>0 的是A.
2 H 2 (g) ＋ O 2 (g) = 2 H 2 O(g)
B.
N 2 (s) ＋ 3 H 2 (g) = 2 NH 3 (g)
C.
NH 4 Cl(s) ＝ NH 3 (g) ＋ HCl(g)
D.
C(s) ＋ O 2 (g) = CO 2 (g)
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