Intermolecular Forces

Question 1

Explain Dipole-dipole forces

Answer 1

Dipole-dipole forces:
Forces between two polar molecules

Question 2

Explain Dipole forces (London forces)

Answer 2

Induced dipole forces or London forces:
Forces between non-polar molecules

Question 3

Explain Hydrogen bonding

Answer 3

Hydrogen bonding:
Forces between molecules in which hydrogen is covalently bonded to nitrogen, oxygen or fluorine – a special case of dipole-dipole forces

Question 4

Explain the difference between Intermolecular and Intramolecular (Interatomic) forces in words

Answer 4

Intermolecular forces are the forces of attraction or repulsion that exist between different molecules or atoms.
Intramolecular (Interatomic) forces are the forces that exist between atoms within a molecule.

Question 5

Boiling Point

Answer 5

Boiling point is the temperature of a liquid at which its vapour pressure equals the external (atmospheric) pressure.

Question 6

Melting Point

Answer 6

Melting point is the temperature at which a solid, given sufficient heat, becomes a liquid.

Question 7

Freezing Point

Answer 7

Freezing point is the temperature at which a liquid changes to a solid by the removal of heat.