下列热化学方程式中ΔH表示可燃物燃烧热的是

A．C(s)＋1/2O2(g)="CO(g)" ΔH=-110.5kJ/mol

B．2H2(g)＋O2(g)=2H2O(g)ΔH=-571.6kJ/mol

C．CH4(g)＋2O2(g)=CO2(g)＋2H2O(g) ΔH=-890.3kJ/mol

D．C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l)ΔH=-2800kJ/mol