Kinetic Molecular Theory of Gases

The kinetic theory of gases is a general idea that we use to describe two key concepts.

1. The relationship between the average kinetic energy of the molecules in a gas sample and the temperature.
2. A physical model which is based on a few simple assumptions.
   1. The particles are so small compared with the distance between them that the volume of the individual particles can be assumed to be negligible (zero).
   2. The particles are in constant motion. 
   3. The average kinetic energy of a collection of gas particles is assumed to be directly proportional to the absolute temperature of the gas.
   4. The particles undergo elastic collisions with the walls of the container (there is no net energy loss).
   5. The particles do not attract each other (there are no "intermolecular" forces).

\[ PV = nRT \]