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    Thermo Dynamics

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    Given the values of ΔH ∘ rxn , ΔS ∘ rxn , and T below, determine ΔS univ .

    Part A: ΔH ∘ rxn = 80kJ , ΔS rxn = 143J/K , T= 299K Express your answer using two significant figures.

    Part B ΔH ∘ rxn = 80kJ , ΔS rxn = 143J/K , T= 754K Express your answer using two significant figures.

    Part C : ΔH ∘ rxn = 80kJ , ΔS rxn =− 143J/K , T= 299K Express your answer using two significant figures.

    Part D : ΔH ∘ rxn =− 80kJ , ΔS rxn = 143J/K , T= 403K Express your answer using two significant figures.

    Part E: Predict whether or not the reaction in part A will be spontaneous.

    Part F: Predict whether or not the reaction in part B will be spontaneous.

    Part G: Predict whether or not the reaction in part C will be spontaneous.

    Part H:Predict whether or not the reaction in part D will be spontaneous.

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    https://brainmass.com/chemistry/general-chemistry/thermo-dynamics-553876

    Solution Preview

    ΔS univ = ΔS ∘ rxn - (ΔH ∘ rxn/T)

    Part A: ΔS univ = 143 - (80000/299) = -124.56J or -0.12kJ

    Part B: ΔS univ = 143 - (80000/754) = +36.90J or +0.04kJ

    Part C: ΔS univ = -143 ...

    Solution Summary

    The solution discuses thermo dynamics with the given values.

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