L1: Intermolecular Forces

(1) Kinetic molecular model, properties of liquids and solids. (2) Types of intermolecular forces. (3) Phase changes, boiling point, vapor pressure

Kinetic Molecular Theory

1. Matter is made of particles that are in constant motion

2. The amount of kinetic energy in a substance is related to its temperature.

3. There is space between particles that is related to its state of matter.

4. Phase changes happen when the temperature of the substance changes sufficiently.

5. There are attractive forces in between particles called intermolecular forces. The strength of these forces increase as particles get closer together.

Intramolecular Forces

are forces that holds atom together WITHIN a molecule

Intermolecular Forces

forces that exist BETWEEN molecules

London Dispersion Forces

intermolecular forces of attraction that exist between all atoms and molecules and are present among symmetrical nonpolar substances

Dipole-dipole Forces

are attractive forces between the positive end of one molecule and the negative end of another