A:CO(g)+ 12 O2(g)═CO2(g)△H=﹣283 kJ•mol﹣1
B:CH4(g)+2O2(g)═CO2(g)+2H2O(g)△H=﹣802.3 kJ•mol﹣1
C:2H2(g)+O2(g)═2H2O(l)△H=﹣571.6 kJ•mol﹣1
D:H2(g)+Cl2(g)═2HCl(g)△H=﹣184.6 kJ•mol﹣1