The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion. The degree to which the particles move is determined by the amount of energy they have and their relationship to other particles.

What is kinetic theory of matter for Kids?

Kinetic theory or kinetic theory of gases attempts to explain overall properties of gases, such as pressure, temperature, or volume, by considering their molecular composition and motion. The theory basically states that pressure is not caused by molecules pushing each other away, like earlier scientists thought.

What are the 3 main points of the kinetic theory of matter?

The simplest kinetic model is based on the assumptions that: (1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size; (2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the …

What are the two main ideas in the kinetic theory of matter?

Key Points Solid particles have the least amount of energy, and gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed.

What does the kinetic theory explain?

Kinetic energy is energy that an object has because of its motion. The Kinetic Molecular Theory explains the forces between molecules and the energy that they possess. When the molecules collide with each other, or with the walls of a container, there is no significant loss of energy.

What is the kinetic theory of liquids?

Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces. These forces keep particles close together.

How does the kinetic theory explain Charles Law?

According to Charles law, for a fixed mass of the gas at constant pressure the volume of the gas is proportional to the temperature. When the temperature is increased, the kinetic energy of the molecules increases. This increases the rate of collision and causes an increase in pressure.

What are the 6 postulates of the kinetic molecular theory?

The five main postulates of the KMT are as follows: (1) the particles in a gas are in constant, random motion, (2) the combined volume of the particles is negligible, (3) the particles exert no forces on one another, (4) any collisions between the particles are completely elastic, and (5) the average kinetic energy of …

How does the kinetic molecular theory of matter work?

The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in. This in turn determines whether the substance exists in the solid, liquid, or gaseous state.

What are the postulates of the kinetic molecular theory?

Kinetic Molecular Theory. Some of the postulates of KMT are as follows: Matter is made of particles that are constantly in motion. This energy in motion is called kinetic energy. The amount of kinetic energy in a substance is related to its temperature. There is space between particles.

How does kinetic theory relate to solids and liquids?

This lesson explores the kinetic molecular theory and how it pertains to the properties of solids and liquids. You’ll learn the properties of solids and liquids, discover the types of intermolecular attractions that occur between them and gain an understanding how phase changes happen.

How does the kinetic theory of matter relate to diffusion?

Changes in phase: A change in phase may occur when the energy of the particles is changed. The kinetic theory of matter is also illustrated by the process of diffusion. Diffusion is the movement of particles from a high concentration to a low concentration. It can be seen as a spreading-out of particles resulting in their even distribution.