焦炭还原氧化铁是吸热反应还是放热反应?

【专家解说】：3CO(g) Fe2O3(s) = 2Fe(s) 3CO 2(g) C(s) O2(g)=CO2(g) △H=-393.5KJ/mol CO2(g) C(s)=2CO(g) △H= 172.46KJ/mol 2CO(g) O2(s)=2CO2(g) △H=-393.5KJ/mol -172.46KJ/mol=-565.96KJ/mol 3CO(g) 3/2O2(s)=3CO2(g) △H=-848.94KJ/mol 2Fe(s) 3/2O2(g)=Fe2O3(s) △H=-824.21KJ/mol Fe2O3(s) 3CO(g) = 2Fe(s) 3CO 2(g)△H=-848.94-(-824.21)KJ/mol 最终Fe2O3(s) 3CO(g) = 2Fe(s) 3CO2(g)△H=-24.73KJ/mol 是吸热反应