Diffusion also occurs when particles have the freedom of movement. Diffusion is present in gases and particles dissolved in solution.

Diffusion occurs when particles spread.. They migrate from an area where they are in high concentration to a location where there is low concentration

Diffusion occurs When chemicals like the scent of perfume which spreads around the house. The particles of the perfume mingle with the air particles. Particles of the perfume are basically free to move energetically in all directions. They eventually spread out the room.

What is
Diffusion?