在一定条件下,CO和CH4燃烧的热化学方程式分别为 2CO(g)+O2(g)=2CO2(g); △H=-566kJ/mol CH4(g)+2O2(g)=CO2(g)+2H2O(1);△H=-890kJ/mol 又知由H2与O2反应生成液态H2O比生成气态H2O多放出44kJ/mol的热量。则CH4气在空气中不完全燃烧热化学方程式正确的是 |
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A.2CH4(g)+7/2O2(g)=CO2(g)+CO(g)+4H2O(1) △H=-1214kJ/mol B.2CH4(g)+7/2O2(g)=CO2(g)+CO(g)+4H2O(g) △H=-1038kJ/mol C.3CH4(g)+5O2(g)=CO2(g)+2CO(g)+6H2O(1) △H=-1538kJ/mol D.3CH4(g)+5O2(g)=CO2(g)+2CO(g)+6H2O(g) △H=-1840kJ/mol |