The chemical reaction that causes aluminum to corrode in air is given by 4Al+3O2→2Al2O3 in which at 298 K   ΔH∘rxnΔHrxn∘ = −3352 kJ= −3352 kJ ΔS∘rxnΔSrxn∘ = −625.1 J/K   What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298 K.

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