试题与答案

相同温度时,下列两个反应的反应热分别用ΔH1和ΔH2表示,则() ①H2(g)+

题型:选择题

题目:

相同温度时,下列两个反应的反应热分别用ΔH1和ΔH2表示,则(   )

①H2(g)+O2(g)====H2O(g)  ΔH1=-Q1 kJ·mol-1

②2H2O(l)====2H2(g)+O2(g) ΔH2=+Q2 kJ·mol-1

A.Q1>Q2

B.Q1=Q2

C.2Q1<Q2

D.Q2=Q1

答案:

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参考答案:A

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