下列热化学方程式中的ΔH能表示物质燃烧热的是（　　）

A．2 CO(g) + O2(g) =" 2" CO2(g) ΔH =" -" 566 KJ·mol^-1

B．CH4(g) + 2 O2(g) = CO2(g) + 2 H2O(l) ΔH =" -" 890 KJ·mol^-1

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

D．H2(g) + Cl2(g) =" 2" HCl(g) ΔH =" -" 184.6 KJ·mol^-1