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# How does the particle theory explain why solids liquids and gases are different?

## How does the particle theory explain why solids liquids and gases are different?

There is empty space between particles and particles are constantly moving (their speed is changed by temperature). The particles in solids and liquids are quite close to each other, while those in gases are a very long way apart.

## How does the particle theory explain why solids Cannot be compressed?

SolidsEdit They are held tightly together by strong forces of attraction. They are held in fixed positions but they do vibrate. Because the particles don’t move, solids have a definite shape and volume, and can’t flow. Because the particles are already packed closely together, solids can’t easily be compressed.

What happens to particles when solids expand?

When substances expand or contract, their particles stay the same size. the particles in a solid vibrate more when it is heated, and take up more room. the particles in a liquid move around each other more when it is heated, and take up more room.

How does the particle theory explain why gases spread out to fill a container?

Gases don’t have a fixed shape or a fixed volume. The particles move around all the time and spread out. This is why a gas fills its container. A gas can be compressed into a very small space – this pushes the particles closer together.

### Do particles expand when heated?

All three states of matter (solid, liquid and gas) expand when heated. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

### How does the particle theory explain gas pressure?

Gas pressure Since the particles in a gas are moving fast and randomly, collisions occur frequently. The pressure from gas molecules may increase if there are more molecules colliding each second or if the molecules are moving faster.

What are the key points of particle theory?

What are the six main points of the particle theory of matter?

• All matter is made of particles.
• Particles have space between them.
• Particles are always moving.
• Particles move faster and get farther apart when heated.
• Particles are attracted to each other.
• All Particles of the same substance are identical.

How does the kinetic particle theory explain the properties of solids?

The kinetic particle theory explains the properties of solids, liquids and gases. There are energy changes when changes in state occur. Brownian motion is the random movement of fluid particles. All three states of matter (solid, liquid and gas) expand when heated. The atoms themselves do not expand, but the volume they take up does.

## How are particles in solids and gases different?

The particles in solids are tightly packed and locked in place, but still vibrate. In liquids the particles have more energy. This allows the particles in liquids to roll past each other, but they are still tightly packed. In gases the particles have a lot of energy. This means that they are not tightly packed and can move apart.

## Why are particles in liquids more tightly packed than in gases?

In liquids the particles have more energy. This allows the particles in liquids to roll past each other, but they are still tightly packed. In gases the particles have a lot of energy. This means that they are not tightly packed and can move apart. Gases can be compressed because the particles can be forced closer together.

When do solids, liquids and gases expand?

All three states of matter (solid, liquid and gas) expand when heated. The atoms themselves do not expand, but the volume they take up does. When a solid is heated, its atoms vibrate faster about…