已知：Fe₂O₃(s)＋3/2C(s)=3/2CO₂(g)＋2Fe(s) △H=234．1kJ·mol^-1

C(s)＋O₂(g)=CO₂(g) △H=－393．5kJ·mol^-1

则2Fe(s)＋3/2O₂(g)=Fe₂O₃(s)的△H是 [ ]

A．－824．4kJ·mol^-1

B．－627．6kJ·mol^-1

C．－744．7kJ·mol^-1

D．－169．4kJ·mol^-1

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