Chapter 11.5, Problem 11.4CYU

(a)

Interpretation Introduction

Interpretation:

The predominant molecular force present in ${\text{O}}_{\text{2}}$ has to be determined.

Concept Introduction:

Intermolecular forces in a molecule are the important factor which is responsible for the physical changes of the molecule.

The intermolecular forces in gases are negligibly small and the forces are comparatively stronger in liquids and the intermolecular forces are highest in solids.

The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.

Three types of intermolecular forces:

• London dispersion (Induced dipole-induced dipole forces)
• Dipole-dipole
• Hydrogen bonding

(b)

Interpretation Introduction

Interpretation:

The predominant molecular force present in liquid ${\text{CH}}_{\text{3}}\text{OH}$ has to be determined.

Concept Introduction:

Intermolecular forces in a molecule are the important factor which is responsible for the physical changes of the molecule.

The intermolecular forces in gases are negligibly small and the forces are comparatively stronger in liquids and the intermolecular forces are highest in solids.

The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.

Three types of intermolecular forces:

• London dispersion
• Dipole-dipole
• Hydrogen bonding

(c)

Interpretation Introduction

Interpretation:

The predominant molecular force present in ${\text{N}}_{\text{2}}\text{dissolved}\text{in}{\text{H}}_{\text{2}}\text{O}$ has to be determined.

Concept introduction:

Intermolecular forces in a molecule are the important factor which is responsible for the physical changes of the molecule.

The intermolecular forces in gases are negligibly small and the forces are comparatively stronger in liquids and the intermolecular forces are highest in solids.

The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.

Three types of intermolecular forces:

• London dispersion
• Dipole-dipole
• Hydrogen bonding