问题
不定项选择题
25℃和1.01×105Pa时，反应2N2O5(g)＝4NO2(g)＋O2(g) ΔH＝＋56.7kJ/mol，自发进行的原因是[ ]
A．是吸热反应
B．是放热反应
C．是熵减少的反应
D．熵增大效应大于能量效应
答案
答案：D
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25℃和1.01×105Pa时，反应2N2O5(g)＝4NO2(g)＋O2(g) ΔH＝＋56.7kJ/mol，自发进行的原因是[ ]
A．是吸热反应
B．是放热反应
C．是熵减少的反应
D．熵增大效应大于能量效应
答案：D
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