# What are the main theories of the kinetic molecular theory of gases?

## What are the main theories of the kinetic molecular theory of gases?

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 explain the expansion of gases?

If they move faster, the particles will exert a greater force on the container each time they hit the walls, which leads to an increase in the pressure of the gas. If the walls of the container are flexible, it will expand until the pressure of the gas once more balances the pressure of the atmosphere.

How would you explain kinetic theory of gases?

The model, called the kinetic theory of gases, assumes that the molecules are very small relative to the distance between molecules. The molecules are in constant, random motion and frequently collide with each other and with the walls of any container.

What are the 4 main parts of kinetic theory?

Explanation:

• Gas formed by point-like particles ( volume≈0 );
• No intermolecualar attractions between the molecules of the gas;
• Random motion;
• Elastic collisions.

### What is the purpose of KMT?

The reason we use the KMT, despite gases not perfectly following it in real life, is because it helps us understand and describe the behaviour of gases. It also helps us write equations to describe these behaviours of gases—one such equation is the Ideal Gas Law, which states that pV=nRT .

### What is the importance of the kinetic molecular theory of gases?

The Kinetic Molecular Theory allows us to explain the existence of the three phases of matter: solid, liquid, and gas. In addition, it helps explain the physical characteristics of each phase and how phases change from one to another.

What happens to kinetic energy when gas expands?

Answer : When the gas expands at constant temperature, the average kinetic energy of the gas molecules remains the same. However, due to increase in volume of the gas, separation between the molecules increases.

How are gas laws explained on the basis of kinetic theory of gases?

The Gas Laws Explained from a KMT Perspective Kinetic explanation of Boyle’s law: Boyle’s law is easily explained by the kinetic molecular theory. The pressure of a gas depends on the number of times per second that the molecules strike the surface of the container.

#### How can you apply the kinetic molecular theory of gases in your daily life?

When you pump air into a tire, the gas molecules inside the tire get compressed and packed closer together. This increases the pressure of the gas, and it starts to push against the walls of the tire. Helium balloons also experience expansion and contraction with change in surrounding temperature.

Why are KMT and the reality of gasses not exactly the same?

Not all particles of gas in a sample have the same speed and so they do not have the same kinetic energy. The temperature of a gas is proportional to the average kinetic energy of the gas particles.

Why is KMT important?

By making several assumptions about the motion and energy of molecules, KMT provides scientists with a useful framework for understanding how the behavior of molecules influences the behaviors of different states of matter, particularly the gas state.

## What is the purpose of the kinetic molecular theory?

The kinetic-molecular theory explains the states of matter, and is based on the idea that matter is composed of tiny particles that are always in motion. This theory helps explain observable properties and behaviors of solids, liquids, and gases.

## How does KMT 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. Kinetic theory explains why the volume of the container should increase with the increase in the temperature to keep the pressure constant.

What is the origin of gas pressure according to kinetic theory?

1 Answer. Gas pressure is caused by the collisions of gas particles with the walls of the container.

How would you relate gases and kinetic molecular theory of gases in real life?

You can observe a real-life application of Boyle’s Law when you fill your bike tires with air. When you pump air into a tire, the gas molecules inside the tire get compressed and packed closer together. This increases the pressure of the gas, and it starts to push against the walls of the tire.