Intermolecular Forces – van der Waals forces, hydrogen bonding

Question 1

Van der Waals Forces:

Answer 1

London Dispersion Forces: Occur between all molecules, significant when no stronger bonds are present.
Dipole-Dipole Forces: Occur between polar molecules.
Larger molecules have stronger van der Waals forces.

Question 2

Hydrogen Bonds:

Answer 2

Strongest van der Waals force, significant in large numbers.
Weaker individually compared to ionic or covalent bonds.