3. 25℃、101kPa 下,碳、氢气、甲烷和葡萄糖的燃烧热依次是 393.5kJ/mol、285.8kJ/mol、890.3kJ/mol、2800kJ/mol。下列热化学方程式中,正确的是
A.C(s)+O2(g)=CO(g) △H=-393.5kJ/mol |
B.2H2(g)+O2(g)=2H2O(l) △H=+571.6kJ/mol |
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H=-890.3kJ/mol |
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l) △H=-1400 kJ/mol |