A.C(s)+1/2O2(g)=CO(g) △H= -393.5 kJ/mol B.2H2(g)+O2(g)=2H2O(l) △H= +571.6 kJ/mol C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= -890.3 kJ/molD.C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H= -2800 kJ/mol
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