根据下列热化学方程式
(1)C(s)+O2(g)=CO2(g) △H1=-393.5 kJ/mol
(2)H2(g)+O2(g)=H2O(1) △H2=-285.8 kJ/mol
(3)CH3COOH(1)+2O2(g)=2CO2(g)+2H2O(1) △H3=-870.3 kJ/mol
可以计算出2C(s)+2H2(g)+O2(g)=CH3COOH(1)的△H为
A.△H=+244.1kJ/mol | B.△H=-488.3 kJ/mol |
C.△H=-996.6 kJ/mol | D.△H=+996.6 kJ/mol |