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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Chapter
Section
BuyFindarrow_forward

Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079
Textbook Problem

Which member of each of the following pairs of compounds would you expect to have the higher boiling point?

  1. a. 1-Butanol and 1-heptanol
  2. b. Butane and 1-propanol
  3. c. Ethanol and 1,2-ethanediol

(a)

Interpretation Introduction

Interpretation:

The member that is expected to have higher boiling point among the given pair has to be identified.

Concept Introduction:

Alcohol is an organic compound that has hydroxyl as its functional group.  Alcohols contain both nonpolar and polar groups in it.  Hydroxyl group is the polar group and the alkyl group is the nonpolar group.  Physical properties of alcohol depend on which of the two groups dominate.

Boiling point depends upon hydrogen bonding in alcohols.  If an alcohol has more than one hydroxyl group in it, then it is expected to have higher boiling point.  As the length of the carbon chain increases, the boiling point of alcohol also increases.

Explanation

Given compounds are 1-butanol and 1-heptanol.  Comparing the carbon chain between the given alcohols, it is found that 1-heptanol has longer carbon chain of seven carbon atoms than 1-butanol which contains four carbon atoms...

(b)

Interpretation Introduction

Interpretation:

The member that is expected to have higher boiling point among the given pair has to be identified.

Concept Introduction:

Alcohol is an organic compound that has hydroxyl as its functional group.  Alcohols contain both nonpolar and polar groups in it.  Hydroxyl group is the polar group and the alkyl group is the nonpolar group.  Physical properties of alcohol depend on which of the two groups dominate.

Boiling point depends upon hydrogen bonding in alcohols.  If an alcohol has more than one hydroxyl group in it, then it is expected to have higher boiling point.  As the length of the carbon chain increases, the boiling point of alcohol also increases.

(c)

Interpretation Introduction

Interpretation:

The member that is expected to have higher boiling point among the given pair has to be identified.

Concept Introduction:

Alcohol is an organic compound that has hydroxyl as its functional group.  Alcohols contain both nonpolar and polar groups in it.  Hydroxyl group is the polar group and the alkyl group is the nonpolar group.  Physical properties of alcohol depend on which of the two groups dominate.

Boiling point depends upon hydrogen bonding in alcohols.  If an alcohol has more than one hydroxyl group in it, then it is expected to have higher boiling point.  As the length of the carbon chain increases, the boiling point of alcohol also increases.

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