已知下列热化学方程式:Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g);△H="-24.8" kJ/mol
Fe2O3(s)+ CO(g)Fe3O4(s)+CO2(g);△H="-15.73" kJ/mol
Fe3O4(s)+ CO(g)3FeO(s)+CO2(g);△H="+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 |