What is Diffusion?

Systems are often not in equilibrium; that is, the movement of materials into and out of the system is not equal. Diffusion is a movement in which the net direction of movement is from an area of high concentration to an area of low concentration. When equilibrium is reached, the concentration on both sides should be equal. However, it is important to know that even at equilibrium, the movement between the two sides still occurs, but the rate of movement is the same. Another important thing to keep in mind is that diffusion is a passive process so no energy is used.

Examples of diffusion

Diffusion Lab

Mr. Gao and Mr. Martin