Kinetic Molecular Theory

Purpose of KMT

To simply explain the behaviours linked to all of the gas laws.

Gas particles are________ and ____ ___________.

tiny, far apart

Gas particles are ____________ _______________ in random directions.

constantly moving

Collisions are ________________. (When collisions happen, no _____________ ________ is lost)

elastic, kinetic energy

There are no ______________ or ________________ forces between particles.

attractive, repulsive

The average _____________ energy of particle depends only on ______________.

kinetic, temperature

Name the five postulates of KMT

1. Gas particles are tiny and far apart

2. Gas particles are constantly moving in random directions

3. Collisions are elastic (no kinetic energy is lost with collisions)

4. There are no attractive or repulsive forces between particles

5. The average energy of particles depends only on temperature

Ideal gas

A gas that behaves PERFECTLY according to the gas laws

Purpose of ideal gases

Useful for calculations

Real gases

A gas that actually exists and does not behave perfectly according to gas laws

Have particle volume and IMF

When do real gases behave like ideal gases?

When temperature is high and/or pressure is low

When do real gases not behave like ideal gases?

When temperature is low and/or pressure is high