Intermolecular Forces

Dipole-dipole forces

Partial charges interact with other partial charges on other polar molecules. These interactions are small and weak, but get stronger with an increasing number of interacting molecules

Hydrogen bonding

A type of dipole-dipole interaction, but with hydrogen. Generally occurs between O-H and N-H. Interaction energy is stronger than dipole-dipole

London dispersion forces

Weakest forces caused by temporary dipoles. The more linear the molecules are, the more attracted they will be to each other. Energy is also greater for molecules with higher molecular weight (# of electrons)

Polarizability

How tightly held electrons are to the nucleus of an atom