What is diffusion?

Answer 1

Diffusion is also a passive process that does NOT require energy as particles move from an area of high concentration to an area of low concentration until they are spread out evenly. An example is the diffusion of perfume or AXE spray throughout a room after it is sprayed.

Answer 2

Diffusion is a mass transfer phenemona that distributes a chemical species to become more uniform is space as time passes.

An example of diffusion is the diffusion of water,or osmosis, where water will transfer across a cell membrane based on the concentration of ions inside and outside of the cell.