分析以下几个热化学方程式，能表示燃烧热的是(  )

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

B．C(s)+O2(g) ==CO2(g)ΔH =" -393.5" kJ/mol

C．2H2(g)＋O2(g)==2H2O(l)ΔH =" -571.6" kJ/mol

D．H2(g)＋1/2O2(g)==H2O(g)ΔH =" -241.8" kJ/mol