# What happens to molecules in a solid?

## What happens to molecules in a solid?

Solids, liquids, and gases are made of tiny particles called atoms and molecules. In a solid, the particles are very attracted to each other. They are close together and vibrate in position but don’t move past one another. In a liquid, the particles are attracted to each other but not as much as they are in a solid.

How do molecules behave in a liquid?

In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

How do molecules behave?

The behaviour of molecules in different phases of matter represents a balance between the kinetic energies of the molecules and the attractive forces between them. All molecules are attracted to each other. At the same time, all molecules are in constant motion, and their kinetic energies increase with the temperature.

### How fast do molecules move in a solid?

In a solid, atoms are packed tightly together and move very slowly. In fact, they do not flow at all: they simply vibrate back and forth. Because the atoms in a solid are so tightly packed, solid matter holds its shape and cannot be easily compressed. Solids also have a definite volume.

What has a definite size but no shape?

A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.

What are the 3 properties of a liquid?

All liquids show the following characteristics:

• Liquids are almost incompressible. In liquids molecules are pretty close to each other.
• Liquids have fixed volume but no fixed shape.
• Liquids flow from higher to lower level.
• Liquids have their boiling points above room temperature, under normal conditions.

## How fast are molecules moving in a liquid?

In its liquid form, water molecules move around slowly, sliding past each other. As the temperature drops or decreases, the water molecules gradually slow down. Eventually they stop moving and simply vibrate back and forth.

How do molecules behave when heated?

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Does gas have its own shape?

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.

### How do solid molecules move?

In a solid, atoms are packed tightly together and move very slowly. In fact, they do not flow at all: they simply vibrate back and forth. Because the atoms in a solid are so tightly packed, solid matter holds its shape and cannot be easily compressed. In a gas, the atoms move around very quickly and flow easily.

What is the shape of a solid?

Solids have a fixed shape and a fixed size. The particles are very close together and held in place by strong forces (bonds). Their particles cannot move around, but they do vibrate. Because the particles cannot move around, a solid has a fixed shape.

What causes molecules to move in a solid?

Heating speeds up the motion of molecules and cooling slows them down. We’ve also seen that speeding the molecules up makes them move a little further apart and slowing them down allows them to move a little closer together. Ask students if these statements also apply to solids: Do you think the atoms in a solid are attracted to each other?

## How are molecules attracted to each other in a liquid?

The molecules of a liquid are attracted to each other, but move more freely and past one another. Herein, what is the motion of particles in a liquid? Individual particles in liquids are able to move all through the mass of liquid. The motion of particles in a liquid is kinetic energy. When a liquid gets warm, the particles move faster.

How are particles able to move in a liquid?

Individual particles in liquids are able to move all through the mass of liquid. The motion of particles in a liquid is kinetic energy. When a liquid gets warm, the particles move faster. The particles have more kinetic energy. How do particles move in each state of matter?

Why do liquids move more freely than solids?

Explanation: In solids, particles are very closely packed in an orderly arrangement in a lattice and only vibrate in fixed positions. The forces of attraction between them are very strong. In liquids, there are bigger spaces between particles and they move more freely and take the shape of their container.