25℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol，则下列热化学方程式正确的是

A．C(s)+1/2 O2(g)＝CO(g)△H=" ―393.5" kJ/mol

B．2H2(g)+O2(g)＝2H2O(l)△H=" +571.6" kJ/mol

C．CH4(g)+2O2(g)＝CO2(g)+2H2O(g)△H=" ―890.3" kJ/mol

D．C6H12O6(s) +6O2(g)＝6CO2(g)+6H2O(l)△H=" ―2800" kJ/mol