1 g正丁烷(C4H10)燃烧生成CO2和液态水,放出49.6 kJ热量,则其热化学方

1 g正丁烷(C4H10)燃烧生成CO2和液态水,放出49.6 kJ热量,则其热化学方程式为(    )

A.2C4H10+13O28CO2+10H2O   ΔH=-5 753.6 kJ·mol-1

B.2C4H10(g)+13O2(g)

8CO2(g)+10H2O(l) ΔH=-49.6 kJ·mol-1

C.2C4H10(g)+13O2(g)

8CO2(g)+10H2O(l) ΔH=-2 876.8 kJ·mol-1

D.C4H10(g)+13O2(g)

4CO2(g)+5H2O(l) ΔH=-2 876.8 kJ·mol-1

答案

解析:热化学方程式:①标明状态;②各物质的物质的量应与热量对应一致。

答案:D

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