Intermolecular Forces

Question 1

What are the three types of intermolecular forces

Answer 1

Van der waals forces between molecules , permanent dipole-dipole forces between molecules , hydrogen bonding between molecules

Question 2

Arrange the intermolecular forces from weakest to strongest

Answer 2

Weakest
Van de waals forces between molecules

Permanent dipole-dipole forces between molecules

Strongest
Hydrogen bonding between molecules

Question 3

What is a temporary dipole

Answer 3

Electrons are constantly moving and so the change can change distribution at any time.This means one side of a molecule could suddenly become more negative than another if the electrons have moved closer to that side.

Question 4

Explain how a temporary dipole occurs

Answer 4

A temporary dipole in one molecule induces a dipole in another molecule.There is an attraction between delta positive on one molecule and a delta negative on a adjacent molecule

Question 5

What factors affect van der waals forces

Answer 5

Size/mr of the molecule(bigger molecule,more van der waals forces between molecules)
Surface area contact(more surface area,more van der waals forces
Between molecules)