Kinetic Energy and Diffusion

What are the key features of a solid?

- Packed tightly together

- The only movement is a vibration

- The particles have strong forces of attraction between them.

What are the key features of a liquid?

- The particles are still quite close together.

- Less dense than a solid

- The forces between the particles are effective and they can move freely.

What are the key features of a gas?

- The particles are much further apart

- There are almost no forces of attraction between them

What is the change of state from a liquid to a solid called?

Freezing

What about solid to liquid?

Melting

What is the change of state from a liquid to a gas called?

Boiling

What about gas to liquid?

Condensation

What is the change of state from a solid to a gas called?

Sublimation

What is the definition of diffusion?

Diffusion is the movement of particles from an area of high concentration to an area of low concentration.