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已知:Fe2O2(s)+C(s)= CO2(g)+2Fe(s) △H=234.1kJ·mol1

C(s)+O2(g)=CO2(g) △H=-393.5kJ·mol

则2Fe(s)+O2(g)=Fe2O3(s)的△H是  (   

A.-824.4kJ·mol1                                                                              B.-627.6kJ·mol1

C.-744.7kJ·mol1                                                                              D.-169.4kJ·mol1


解析:

(2)=(1)就可得2 Fe(s)+  O2(g) = Fe2O3(s),则ΔΗ= ΔΗ2-ΔΗ1=-824.4 kJ??mol-1。

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已知:Fe2O2(s)+C(s)=CO2(g)+2Fe(s) ΔH=234.1kJ·mol-1

C(s)+O2(g)=CO2(g) ΔH=-393.5 kJ·mol-1

2Fe(s)+O2(g)=Fe2O3(s)ΔH

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-824.4 kJ·mol-1

B.

-627.6 kJ·mol-1

C.

-744.7 kJ·mol-1

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科目:高中化学 来源: 题型:

已知:Fe2O2(s)+C(s)= CO2(g)+2Fe(s) △H=234.1kJ·mol1

C(s)+O2(g)=CO2(g) △H=-393.5kJ·mol1

则2Fe(s)+O2(g)=Fe2O3(s)的△H是  (    )zxxk.com

A.-824.4kJ·mol1                                                                              B.-627.6kJ·mol1

C.-744.7kJ·mol1                                                                              D.-169.4kJ·mol1

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