Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692



Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 12, Problem 29E
Textbook Problem

Which compound would you expect to have the highest boiling point? Why?

a .             CH 3 CH 2 OCH 3 b .            CH 3 CH 2 CH 2 OH c .             CH 3 CH 2 CH 3

Interpretation Introduction


The compound having the highest boiling point is to be explained.

Concept Introduction:

The boiling point of a substance depends upon the intermolecular forces and thermal energy.

Intermolecular forces are of two types: Dispersion forces and dipole forces.

Dispersion forces are possessed by all the atoms and molecules and depend upon the molar mass.

Dipole forces exist between polar molecules and depend upon the polarity of molecules.

Boling point also increases when there is intermolecular hydrogen bonding.

Explanation of Solution

Reason for correct option:

In CH3CH2CH2OH, there is hydrogen bonding between its molecules, as the OH group of one molecule binds with the hydrogen atom of the other molecules. So, the boiling point increases in order to overcome the hydrogen bonding.

Hence, the correct answer is option (b)

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Chemistry In Focus
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