题目内容

在下列反应中，反应（）所放出的热量最少。

A. CH4(l)＋2O2(g)=CO2(g)＋2H2O(g)
B. CH4(g)＋2O2(g)=CO2(g)＋2H2O(g)
CH4(g)＋2O2(g)=CO2(g)＋2H2O(l)
D. CH4(g)＋3/2O2(g)=CO(g)＋2H2O(l)

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