   Chapter 17, Problem 7ALQ

Chapter
Section
Textbook Problem

# Predict the sign of ∆S for each of the following and explain.a. the evaporation of alcoholb. the freezing of waterc. compressing an ideal gas at constant temperatured. dissolving NaCl in water

(a)

Interpretation Introduction

Interpretation: The sign of ΔS for each of the given parts is to be predicted and explained.

Concept introduction: The term entropy generally means randomness or disorderness. The entropy of universe always increases. The spontaneous process always has an increase in entropy. This is actually a second law of thermodynamics.

To determine: The sign of ΔS for the evaporation of alcohol.

Explanation

Explanation

In the given case, the alcohol is basically in liquid state. On evaporation of alcohol, it turns from liquid state to gaseous state which is the most random state...

(b)

Interpretation Introduction

Interpretation: The sign of ΔS for each of the given parts is to be predicted and explained.

Concept introduction: The term entropy generally means randomness or disorderness. The entropy of universe always increases. The spontaneous process always has an increase in entropy. This is actually a second law of thermodynamics.

To determine: The sign of ΔS for the freezing of water.

(c)

Interpretation Introduction

Interpretation: The sign of ΔS for each of the given parts is to be predicted and explained.

Concept introduction: The term entropy generally means randomness or disorderness. The entropy of universe always increases. The spontaneous process always has an increase in entropy. This is actually a second law of thermodynamics.

To determine: The sign of ΔS for the compressing an ideal gas at constant temperature.

(d)

Interpretation Introduction

Interpretation: The sign of ΔS for each of the given parts is to be predicted and explained.

Concept introduction: The term entropy generally means randomness or disorderness. The entropy of universe always increases. The spontaneous process always has an increase in entropy. This is actually a second law of thermodynamics.

To determine: The sign of ΔS on dissolving NaCl in water.

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