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    Change in Gibbs

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    1- Calculate the change in Gibbs free energy for each of the following sets of ΔH ∘ rxn , ΔS ∘ rxn , and T .

    Part A : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn = 248J/K ; T= 298K
    Part B : ΔH ∘ rxn = 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 298K
    Part C : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 298K Express your answer using two significant figures.
    Part D : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 562K Express your answer using two significant figures.
    Part E : Predict whether or not the reaction in part A will be spontaneous at the temperature indicated.
    Part F :Predict whether or not the reaction in part B will be spontaneous at the temperature indicated.
    Part G : Predict whether or not the reaction in part C will be spontaneous at the temperature indicated.
    Part H :Predict whether or not the reaction in part D will be spontaneous at the temperature indicated.

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    https://brainmass.com/chemistry/general-chemistry/change-gibbs-553913

    Solution Preview

    Change in Gibbs free energy (ΔG∘ rxn) is given as = ΔH ∘ rxn - TΔS ∘ rxn

    Note: we have to convert the value of ΔH ∘ rxn from KJ to J to solve the questions.

    Part A: ΔG∘ rxn = - 122000 - (298 * 248) = -195,904J or -195.90kJ (in ...

    Solution Summary

    The solution discusses the change in Gibbs. The expert uses Gibbs free energy to predict if a reaction is spontaneous.

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