How much energy is evolved during the formation of 98.7 g of Fe according to the reaction below? Fe₂O₃(s)+ 2Al(s)→ Al₂O₃(s)+ 2Fe(s)Δ_rH°= -852 kJ

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Quizplus · Accepted Answer

The molar mass of Fe is 55.85 g/mol. For 98.7 g of Fe, moles = 98.7 / 55.85 = 1.767 moles. The reaction produces 2 moles of Fe with ΔH = -852 kJ. Energy evolved for 1.767 moles = (1.767 / 2) * 852 = 753 kJ.

How Much Energy Is Evolved During the Formation of 98