Kinetic Molecular Theory
By Caleb Larson
Four Main Postulates
- A gas consists of a collection of small particles traveling in straight-line motion and obeying Newton's Laws.
- The molecules in a gas occupy no volume, they are simply points.
- Collisions between molecules are perfectly elastic, meaning no energy is gained or lost during the collision.
- There are no attractive or repulsive forces between the molecules.
Difference between Real and Ideal Gases
Any gas that follows the kinetic molecular theory is considered an ideal gas. and any gas that does not is considered a real gas.
The kinetic molecular theory and ideal gas laws are only vallid when pressure is low and the temperature is high.
Perks of the Kinetic Molecular Theory
The kinetic molecular theory allows us to predict diffusion, viscosity, and thermal conductivity.