4Fe(s) + 3O₂(g) → 2Fe₂O₃(s). If the enthalpy of formation (ΔHf) of Fe₂O₃ is −822 kJ/mol, what is the enthalpy of the reaction shown above?
University of Ilorin CHM101 2026-test past question
- −411 kJ
- +411 kJ
- −1644 kJ
- +1644 kJ
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