已知下列热化学方程式:
(1)CH3COOH(l)+2O2(g)==2CO2(g)+2H2O(l) △H1= -870 kJ·mol-1
(2)C(s)+O2(g) ==CO2(g) △H2= -393.5kJ·mol-1
(3) H2(g)+O2(g)==H2O(l) △H3= -285 kJ·mol-1
则反应2C(s)+2H2(g)+O2(g) ==CH3COOH(l) 的反应热△H为( )
A.—243.5 kJ·mol-1 |
B.—487 kJ·mol-1 |
C.—1113.5 kJ·mol-1 |
D.—2227 kJ·mol-1 |