Chapter 8, Problem 68A

Interpretation Introduction

Interpretation: The reason for compounds with strong intermolecular attractive forces having higher boiling points as compared to compounds with weak intermolecular attractive forces needs to be explained.

Concept Introduction: The strength of intermolecular interactions depends on the type of bonding between two atoms. The amount of energy required to break the bond is directly proportional to its strength.

Explanation of Solution

The melting and boiling point of a compound depends on the amount of heat required to break the intermolecular bonds. If a compound has strong intermolecular attractive forces, a large amount of heat is required to break the bond or attraction between the molecules. Thus, the boiling point is high. On the other hand, if there are weak intermolecular attractive forces, a small amount of heat is required and compounds have a low boiling point.