The standard enthalpy of formation of FeO & Fe2 O3 is – 65 kCal mol-1 and -197 kCalmol-1 respectively. A mixture of two oxides contains FeO & Fe2O3 in the mole ratio 2:1. If by oxidation, it is changed into a 1:2 mole ration mixture, how much of thermal energy will be released per mole of the initial mixture?
