Calculate the change in Gibbs free energy for each of the sets of H rx n ,

Calculate the change in Gibbs free energy for each of the sets of ΔH_rxn, ΔS_rxn, and T given in Problem 42. Predict whether or not each reaction is spontaneous at the temperature indicated.

Problem 42

Given the values of ΔH_rxn, and T, determine ΔS_rxn, and predict whether or not each reaction is spontaneous.

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a. AH n = -95 kJ; ASxn-157J/K; T = 298 K b. AH = -95 kJ; ASn = -157 J/K; T = 855 K c. AHxn = -157 J/K; T = 298 K +95 kJ; ASn = -95 kJ; ASixn -95 kJ; ASn = d. AH = +157J/K; T = 398 K