H12341kJ的精选

问题详情：已知：Fe2O3(s)+C(s)==CO2(g)+2Fe(s)  ΔH1=+234.1kJ·mol-1,C(s)+O2(g)==CO2(g)   ΔΗ2=-393.5kJ·mol-1,则2Fe(s)+O2(g)==Fe2O3(s)的ΔH是()A．-824.4kJ·mol-1B．-627.6kJ·mol-1C．-744.7kJ·mol-1...