Chapter 13.3, Problem 4RQ

Interpretation Introduction

Interpretation:

By using the kinetic molecular theory of gases, the motion of the gas particles needs to be explained.

Concept Introduction:

Kinetic molecular theory is constructed on hypothesis about the behaviour of each particle in a gas. The various gas laws such as Boyle’s law, Charles’ law and Avogadro’s law can be explained by using this theory.

Answer to Problem 4RQ

Gases consist of very small particles. These gas particles are in constant motion in different directions, striking with the walls of the container causing the pressure. The size of the particles is very much less compared to the total volume of the gas. The average kinetic energy of gas particles increases with increase in the absolute temperature.

Explanation of Solution

According to kinetic gas theory,

1. Gases consist of very small particles.
2. The volume occupied by the gas molecules is very much less compared to the volume of the gas.
3. The particles in a gas are in constant random motion, striking with the walls of the container. The pressure exerted by the gas arises due to these collisions of particles with the walls.
4. There is no force of attraction between gas particles.
5. The average kinetic energy of gas particles increases with increase in the absolute temperature.