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The chemical reaction that causes aluminum to corrode in air is given by 4Aln + 3O2 → 2Al2O3 in which at 298 K ΔH°rxn = -3352 kJ ΔS°rxn = - 625.1 J/K What is the Gibbs free energy for this reaction at 5979 K? Assume that ΔH and ΔS do not change with temperature. Express your answer to two decimal places and include the appropriate units.