## Kinetic Theory of an Ideal Gas – Class 11 | Chapter – 13 | Physics Short Notes Series PDF for NEET & JEE

Kinetic Theory of an Ideal Gas: The kinetic theory of gases describes the behavior of gases in terms of the motion of their molecules. An ideal gas is a hypothetical gas composed of a large number of small, non-interacting particles that follow the laws of the kinetic theory.

## Assumptions of Kinetic Theory of an Ideal Gas

The kinetic theory of an ideal gas makes the following assumptions:

• The gas is composed of a large number of small particles, each of which has negligible volume.
• The particles are in constant random motion and move in straight lines until they collide with another particle or the walls of the container.
• The collisions between particles are perfectly elastic, meaning that no energy is lost in the collision.
• The particles do not interact with each other, except during collisions.
• The average kinetic energy of the particles is directly proportional to the absolute temperature of the gas.

## Kinetic Theory of an Ideal Gas

Based on these assumptions, the kinetic theory of an ideal gas can explain many of the macroscopic properties of gases, such as pressure, temperature, and volume.

• The pressure of an ideal gas is related to the number of particles colliding with the walls of the container and the force of each collision. The force of each collision is related to the momentum of the particle, which is the product of its mass and velocity. Therefore, the pressure of an ideal gas is directly proportional to the number of particles, their average speed, and their mass.
• The temperature of an ideal gas is related to the average kinetic energy of the particles. As the temperature increases, the particles move faster and their kinetic energy increases.
• The volume of an ideal gas is related to the distance between the particles. As the particles move faster, they tend to move farther apart, increasing the volume of the gas.
• The kinetic theory of an ideal gas provides a powerful tool for understanding the behavior of gases, and it is widely used in many areas of science and engineering.

 JOIN OUR TELEGRAM CHANNELS Biology Quiz & Notes Physics Quiz & Notes Chemistry Quiz & Notes 