①H2(g)+ O2(g)═H2O(l) △H=﹣285.8kJ•mol﹣1
②H2(g)+ O2(g)═H2O(g) △H=﹣241.8kJ•mol﹣1
③C(s)+ O2(g)═CO(g) △H=﹣110.5kJ•mol﹣1
④CO2(g)═C(s)+O2(g) △H=+393.5kJ•mol﹣1
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