题目

已知：Fe2O3(s)+3/2 C(s)=3/2 CO2(g)+2Fe(s)△H=234.1kJ·mol−1 C(s)+O2(g)=CO2(g)△H=−393.5 kJ·mol−1 则2Fe(s)+3/2 O2(g )=Fe2O3(s) 的△H是(  ) A. −824.4 kJ·mol−1            B. −627.6 kJ·mol−1 C. −744.7 kJ·mol−1          D. −169.4 kJ·mol−1 答案：A

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