Kinetic Molecular Theory of Gases

Kinetic Molecular Theory of Gases

The behavior of gases that we study in basic chemistry is based on the following four assumptions, known collectively as the Kinetic Molecular Theory of motion. Making these assumptions allows us to predict properties of gases that hold true most of the time. They are:

  1. A gas consists of a collection of small particles that travel in straight-line motion and obey Newton’s Laws.
  2. Gas particles occupy no volume.
  3. Collisions between particles are perfectly elastic, meaning that no energy is gained or lost during the collision.
  4. There are no attractive or repulsive forces between the particles.