Question Detail

CHM 101 Chemical Bonding and Intermolecular Forces Objective Question

Question

What is the typical strength range of intermolecular forces compared to covalent bonds?
Options
A Covalent bonds: 1-12 kJ/mole; Intermolecular forces: 50-200 kJ/mole
B Covalent bonds: 50-200 kJ/mole; Intermolecular forces: 1-12 kJ/mole
Correct Answer
C Both are approximately equal in strength
D Covalent bonds are weaker than intermolecular forces
Correct Answer

Option B is the correct answer.

Detailed Explanation

Covalent bond strengths typically range from 50-200 kJ/mole, while intermolecular forces (van der Waals forces) are much weaker, ranging from 1-12 kJ/mole. This significant difference explains why molecular substances have lower melting and boiling points than ionic or covalent network solids.

Hint

Intermolecular forces are much weaker than chemical bonds.

Question Info