Calculate the change in Gibbs free energy for each of the following sets of ΔH∘rxn , ΔS∘rxn , and T. (Assume that all reactants and products are in their standard states.) a) ΔH∘rxn =−80.kJ, ΔS∘rxn =−159J/K, T =305K b) ΔH∘rxn=−80.kJ, ΔS∘rxn=−159J/K, T=859K c) ΔH∘rxn=80.kJ, ΔS∘rxn =−159J/K, T=305K d)ΔH∘rxn=−80.kJ, ΔS∘rxn =159J/K, T=394K

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