已知:①CO(g)+ O2(g)═CO2(g)△H1=﹣283.0kJ/mol
②H2(g)+ O2(g)═H2O(g)△H2=﹣241.8kJ/mol
③CH3OH(g)+ O2(g)═CO2(g)+2H2O(g)△H3=﹣192.2kJ/mol
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