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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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What do we mean by entropy? Why does the entropy of the universe increase during a spontaneous process?

Interpretation Introduction

Interpretation:

The term entropy should be defined and why it increases for spontaneous process should be explained.

Concept Introduction:

Entropy is a thermodynamic property that measures the disorder or randomness in a system or in a surrounding. In a spontaneous process there is always an increase in the entropy of the universe.

ΔSuniv > 0or,  ΔSsys + ΔSsurr > 0.

Explanation

According to the second law of thermodynamics the entropy of the universe in increasing:

ΔSuniv > 0or,  ΔSsys + ΔSsurr > 0

Interplay of ΔSsys and ΔSsurr in determining the spontaneity of a reaction:

ΔSsys ΔSsurr Spontaneity
+ + Yes
+ - Only if the magnitude of

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