下列热化学方程式中，ΔH的绝对值能表示可燃物的燃烧热的是(　　)

A．C(s)＋O2(g)===CO(g)　ΔH＝－110.5 kJ·mol^－^1

B．CH4(g)＋2O2(g)===CO2(g)＋2H2O(g)ΔH＝－802.3 kJ·mol^－^1

C．2H2(g)＋O2(g)===2H2O(l)　ΔH＝－571.6 kJ·mol^－^1

D．CO(g)＋O2(g)===CO2(g)　ΔH＝－283 kJ·mol^－^1