Kinetic theory

The kinetic theory of gases is a theory that explains the macroscopic properties of gases by consideration of their composition at a molecular level.

Postulates

The fundamental principles of the kinetic theory are given in the form of several postulates:

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• Gases are composed of molecules in constant, random motion. The moving particles constantly collide with each other and with the walls of the container.
• The collisions between gas molecules are elastic.
• The total volume of the gas molecules is negligible compared to the volume of the container.
• The forces of attraction between the molecules are negligible.

The above postulates accurately describe the behavior of ideal gases. Real gases approach ideality under conditions of low density and high temperature.

Related Topics:
Ideal gas - Real gas

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