Solids, Liquids & Gases (GCSE Chemistry)
Solids, Liquids & Gases
Solids, Liquids and Gases
Solids
- In a solid, the particles are closely packed together in a regular arrangement. The particles in a solid do not move around but instead vibrate about a fixed position.
- Solids generally have a high density and are incompressible. In a solid the particles are held very close together meaning there are a large number of particles within a fixed volume. This gives solids a high density. Solids are incompressible because there are no spaces between the particles. Particles are fixed in position and therefore cannot move around.
Liquids
- In a liquid, the particles are arranged in a random manner and are free to move. The particles in a liquid are still relatively close together which means that the density of a liquid is similar to that of a solid.
- Liquids are virtually incompressible. It is only possible to compress liquids by a small extent because the particles are already quite close together, and there are few spaces between.
- A liquid can flow because of the free particles it consists of. In a liquid, the particles are not fixed in position. This means they are free to move around in solution.
Gases
- In a gas, the particles are very far apart and free to move around. In a gas, the particles have a higher kinetic energy which means they can move far away from each other.
- Gases have a low density and are very compressible. Gases are usually very dense because there are only a few particles present in a fixed volume. They are very compressible because the particles are free to move around and are not held close together.
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