The enthalpy changes for the formation of aluminum oxide and iron (III) oxide are 2Al(s) + 3/2 O2(g) → Al2O3(s) ΔH° -1676 kJ/mol and 2Fe(s) +3/2 O2(g) → Fe2O3(s) ΔH° -824 kJ/mol. What is the ΔH° for the reaction Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(s)?

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