已知下列反应的热化学方程式为:
(1)C(s)+O2(g)=CO2(g) ΔH 1=-393.5kJ/mol
(2)CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH 2=-870.3kJ/mol
(3)H2(g)+1/2O2(g)=H2O(l) ΔH 3=-285.8kJ/mol
则2C(s)+2H2(g)+O2(g) = CH3COOH(l)的反应热ΔH为( )
A.+488.3 kJ/mol |
B.-488.3 kJ/mol |
C.-244.15 kJ/mol |
D.+244.15 kJ/mol |