Calculate standard enthalpy of the reaction Fe₂O₃(s)+3CO(g)→2Fe(s)+3CO₂(g) from the following data:
ΔfHo(Fe₂O₃)=−824.2kJ mol−1, ΔfHo(CO)=−110.5kJ mol−1
ΔfHo(CO₂)=−393.5kJ mol−1(−24.8kJ)