# Thermo Dynamics

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.

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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.

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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