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The reaction of 55.8 g sample of iron (Fe) metal with 1.00 mol of oxygen gas is described by the following reaction equation: 4Fe(s) + 3O2(g) → 2Fe2O3(s) Calculate the energy that is released through this reaction based on the quantities of reactants combined. The standard enthalpy of formation, ΔfHϴ, of Fe2O3 is −826 kJ mol–1.