H2341kJmol的精選

問題詳情：已知：Fe2O3(s)+3/2C(s)=3/2CO2(g)+2Fe(s)   △H=+234.1kJ/mol；        C(s)+O2(g)=CO2(g)   △H=-393.5kJ/mol則2Fe(s)+3/2O2(g)=Fe2O3(s)的△H值是(     )A.-824.4kJ/mol        ...