已知：Fe₂O₃(s)+ 3/2C(s)= 3/2CO₂(g)+2Fe(s) △H=" +234.1" kJ/mol
C(s)+O₂(g)=CO₂(g) △H=" -393.5" kJ/mol
则反应2Fe(s)+ 3/2O₂(g)=Fe₂O₃(s)的△H是

A．-169.4 kJ/mol	B．-627.6 kJ/mol
C．-744.7 kJ/mo	D．-824.4 kJ/mol