已知下列热化学反应方程式:
① Fe2O3(s)+3CO(g) = 2Fe(s)+3CO2(g) ΔH =-24.8 kJ/mol
② Fe2O3(s)+CO(g) = Fe3O4(s)+CO2(g) ΔH =-15.73 kJ/mol
③ Fe3O4(s)+CO(g) =3FeO(s)+CO2(g) ΔH =+640.4 kJ/mol
则14 g CO气体还原足量FeO固体得到Fe固体和CO2气体时对应的ΔH约为
A.-218 kJ/mol | B.-109 kJ/mol |
C.+218 kJ/mol | D.+109 kJ/mol |