Intermolecular Forces

Question 1

What is the definition of intermolecular forces?

Answer 1

Intermolecular forces are weak interactions between dipoles of different molecules.

Question 2

What are the three main categories of these intermolecular forces?

Answer 2

London forces(induced dipole-dipole interactions)
Permanent dipole-dipole interactions
Hydrogen Bonding

Question 3

Rank these types on bonding from weakest to strongest

Answer 3

Weakest-London Forces
Middle-Permanent Dipole-Dipole interactions
Strongest-Hydrogen Bonds

Single covalent bonds are much stronger than these.

Question 4

What are London forces?

Answer 4

London forces are weak intermolecular forces that exist between all molecules, whether polar or non-polar.

Question 5

What makes certain molecules have stronger London forces than others?

Answer 5

Higher Number of Electrons
So Boiling Point therefore is higher.

Question 6

What makes a molecule have permanent dipole-dipole interactions?

Answer 6

If they are polar.
They have permanent dipole-dipole interactions as well as London forces.

Question 7

What is the definition of a Hydrogen Bond?

Answer 7

A hydrogen bond is a special type of permanent dipole-dipole interaction found between molecules containing a hydrogen atom attached to an electronegative atom with a lone pair of electrons.