Question

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

Part A

ΔH∘rxn= 84 kJ , ΔSrxn= 142 J/K , T= 310 K

Express your answer using two significant figures.

ΔSuniv =

J/K

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Part B

ΔH∘rxn= 84 kJ , ΔSrxn= 142 J/K , T= 764 K

Express your answer using one significant figure.

ΔSuniv =

J/K

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Part C

ΔH∘rxn= 84 kJ , ΔSrxn=− 142 J/K , T= 310 K

Express your answer using two significant figures.

ΔSuniv =

J/K

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Part D

ΔH∘rxn=− 84 kJ , ΔSrxn= 142 J/K , T= 405 K

Express your answer using two significant figures.

ΔSuniv =

J/K

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Part E

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

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

	spontaneous
	nonspontaneous

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Part F

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

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

	spontaneous
	nonspontaneous

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Part G

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

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

	spontaneous
	nonspontaneous

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Part H

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

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

	spontaneous
	nonspontaneous