(1)C(s)+O 2(g)=CO 2(g)△H 1=-393.5kJ/mol
(2)H 2(g)+
1
2 O 2(g)=H 2O(l)△H 2=-285.8kJ/mol
(3)CH 3COOH(l)+2O 2(g)=2CO 2(g)+2H 2O(l)△H 3=-870.3kJ/mol
依据热化学方程式(1)×2+(2)×2-(3)得到:△H=-488.3KJ/mol,
故选B.
(1)C(s)+O 2(g)=CO 2(g)△H 1=-393.5kJ/mol
(2)H 2(g)+
1
2 O 2(g)=H 2O(l)△H 2=-285.8kJ/mol
(3)CH 3COOH(l)+2O 2(g)=2CO 2(g)+2H 2O(l)△H 3=-870.3kJ/mol
依据热化学方程式(1)×2+(2)×2-(3)得到:△H=-488.3KJ/mol,
故选B.