①H2(g)+ O2(g)=H2O(l);△H=﹣285kJ/mol
②H2O(g)=H2(g)+ O2(g);△H=+241.8kJ/mol
③C(s)+ O2(g)=CO(g);△H=﹣110.4kJ/mol
④C(s)+O2(g)=CO2(g);△H=﹣393.5kJ/mol
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