试题与答案

天然气燃烧不完全会产生有毒气体CO,又知CO和CH4燃烧的热化学方程式分别为 2

题型:选择题

题目:

天然气燃烧不完全会产生有毒气体CO,又知CO和CH4燃烧的热化学方程式分别为

2CO(g)+O2(g)=2CO2(g)  ΔH=-566 kJ·mol-1

CH4(g)+2O2(g)=CO2(g)+2H2O(l)ΔH=-890 kJ·mol-1

又知由H2与O2反应生成液态H2O 比生成气态H2O 多放出44 kJ·mol-1的热量。则下列热化学方程式正确的是  [ ]

A.3CH4(g)+5O2(g)=CO2(g)+2CO(g)+6H2O(g) ΔH=-1840 kJ·mol-1

B.2CH4(g)+7/2 O2(g)=CO2(g)+CO(g)+4H2O(g) ΔH=-1038 kJ·mol-1

C.3CH4(g)+5O2(g)=CO2(g)+2CO(g)+6H2O(l) ΔH=-1538 kJ·mol-1

D.2CH4(g)+7/2 O2(g)=CO2(g)+CO(g)+4H2O(l) ΔH=-1214 kJ·mol-1

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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