成教云: 由下列数据确定CH4(g)的△fHΘm为()①C(石墨)+O2(g)=CO2(g)△rHΘm,1=-393.5kJ·mol-1②H2(g)+O2(g)=H2O(l)△rHΘm,2=-285.8kJ·mol-1③CH4(g)+2O2(g)=CO2(g)+2H2O(l)△rHΘm,3=-890.3kJ·mol-1
成教云: 由下列数据确定CH4(g)的△fHΘm为() ①C(石墨)+O2(g)=CO2(g)△rHΘm,1=-393.5kJ·mol-1 ②H2(g)+O2(g)=H2O(l)△rHΘm,2=-285.8kJ·mol-1 ③CH4(g)+2O2(g)=CO2(g)+2H2O(l)△rHΘm,3=-890.3kJ·mol-1
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