Chapter 13, Problem 87A

Interpretation Introduction

Interpretation: The given intermolecular attractions are to be arranged in order of increasing

Concept introduction:

Intermolecular force is the force of attraction that unites two atoms or molecules to form a molecule or other substance. In essence, nature is attractive. It also works between atoms and ions. For a matter that is solid, liquid, or gaseous, the intermolecular force differs.

Answer to Problem 87A

Dispersion forces < dipole interactions < Hydrogen bonding

Explanation of Solution

The dispersion forces are the weakest among given and occur between non-polar molecules. These are van der Waals forces.

The dipole interactions occur in polar molecules and the molecules are held together by dipole-dipole interactions.

The hydrogen bond is strongest among the given. It is also a dipole-dipole interaction but stronger.

Thus, the order is as follows:

Dispersion forces < dipole interactions < Hydrogen bonding