6、8H18(l)+22.5O2(g)═8CO2(g)+9H2O(l)△H=-5518kJ•mol-1C.C8H18(l)+22.5O2(g)═8CO2(g)+9H2O(l)△H=+5518kJ•mol-1D.C8H18(l)+22.5O2(g)═8CO2(g)+9H2O(l)△H=-48.40kJ•mol9.已知25℃、101kPa条件下:4Al (s) + 3O2 (g)=2Al2O3 (s) △H=-2834.9 kJ/mol4Al (s) + 2O3 (g) = 2Al2O3 (s) △H= -3119.91kJ/