①CH4(g)+ O2(g)⇌CO(g)+2H2(g)△H=﹣36kJ/mol
②CH4(g)+H2O(g)⇌CO(g)+3H2(g)△H=+206kJ/mol
③CH4(g)+CO2(g)⇌2CO(g)+2H2(g)△H=+247kJ/mol副反应
④CH4(g)+2O2(g)⇌CO2(g)+2H2O (g)△H=﹣889.6kJ/mol