Chapter 14, Problem 18A

Interpretation Introduction

Interpretation: The difference between intramolecular and intermolecular forces has to be explained.

Concept introduction: On the molecular level, atoms and molecules interact with each other through chemical bonds. Bonds can be classified into two types called as,

1. Intermolecular bonds
2. Intramolecular bonds

Intramolecular bonds are those bonds that strongly hold the atoms in a molecule together.

Intermolecular bonds are those bonds that strong hold the atoms on different molecules together.

Answer to Problem 18A

When the forces occur between different molecules, they are called as intermolecular forces.

When the force acts inside the same molecules, they are called as intramolecular forces.

Explanation of Solution

On the molecular level, atoms and molecules interact with each other through chemical bonds. Bonds can be classified into two types called as,

1. Intermolecular bonds
2. Intramolecular bonds

Intramolecular bonds are those bonds that strongly hold the atoms within a molecule together, and the forces acting are called as intramolecular forces.

Intramolecular forces are of three types,

• Ionic bonding
• Covalent bonding
• Metallic bonding

Intermolecular bonds are those bonds that strong hold the atoms on different molecules together and the forces acting are called as intermolecular forces.

Intermolecular forces of three types,

• Dipole-dipole attraction
• Hydrogen bonding
• London dispersion forces

The below diagram is an example of intermolecular and intramolecular forces.

  

Conclusion

Intermolecular forces occur between different molecules, whereas intramolecular forces occur inside the same molecule.