已知下列反应的反应热
(1)CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ,△H1=-870.3kJ/mol
(2)C(s)+O2(g)=CO2(g) ,△H2=-393.5kJ/mol
(3)H2(g)+1/2O2(g)=H2O(l) ,△H3=-285.8kJ/mol
则下列反应的反应热为2C(s)+2H2(g)+O2(g) =CH3COOH(l)
A.△H=-488.3kJ/mol | B.△H3=-244.15kJ/mol |
C.△H3=-977.6kJ/mol | D.△H3=+488.3kJ/mol |