已知下列热化学方程式:
①CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol;
②C(s)+O2(g)===CO2(g) ΔH2=-393.5 kJ/mol;
③H2(g)+O2(g)===H2O(l)ΔH3=-285.8 kJ/mol。
则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l)的ΔH为( )
A.-488.3 kJ/mol |
B.-244.15 kJ/mol |
C.+488.3 kJ/mol |
D.+244.15 kJ/mol |