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Chemistry In Focus

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

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 12, Problem 1SC
Textbook Problem
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Substance A is composed of molecules that have stronger intermolecular forces than the molecules that compose substance B. Which substance has a lower boiling point?

a. substance A

b. substance B

c. cannot be determined without more information.

Interpretation Introduction

Interpretation:

The substance having the lower boiling point is to be identified.

Concept Introduction:

Boiling point of a substance depends upon the intermolecular forces.

Intermolecular forces keep the molecules combined together. Greater the intermolecular force, higher is the boiling point of that substance.

Thermal energy is acquired by the molecules in motion. Higher the temperature, greater is the motion of the molecules or atoms.

Explanation of Solution

Reason for correct option:

Since the molecules of substance, A have stronger intermolecular forces than those of substance B. Thus, the molecules of substance A are more tightly packed together than those of substance B, which means that the thermal energy of substance A is lower than that of substance B.

As the boiling point of a substance depends upon the intermolecular forces and the thermal energy, therefore, the molecules which are more tightly packed will require a higher temperature than the molecules with lesser intermolecular forces...

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Chapter 12 Solutions

Chemistry In Focus
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