反应 (1)CoO(s) + CO(g) → Co(s) + CO 2 (g) ; (2) CO 2 (g) + H 2 (g) → CO(g) + H 2 O(l) ; (3) H 2 O(l) → H 2 O(g) ;的平衡常数各为 K 1 、 K 2 和 K 3 。则反应 CoO(s)+ H 2 (g) → Co(s)+ H 2 O(g) 的 K 等于
A.
K 1 + K 2 + K 3
B.
K 1 - K 2 - K 3
C.
K 1 K 2 K 3
D.
K 1 K 3 / K 2
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