• Diffusion refers to the process by which molecules or particles spread from areas of higher concentration to areas of lower concentration, resulting in a uniform distribution over time.

• This phenomenon occurs in various contexts, including gases, liquids, and solids, driven by the natural tendency of particles to move and mix due to their kinetic energy.

  
  

• In biological and chemical systems, diffusion plays a crucial role in processes such as the movement of oxygen and carbon dioxide across cell membranes, the dispersal of nutrients within cells, and the mixing of chemicals in solution. It is governed by principles such as Fick's laws of diffusion, which describe how the concentration gradient influences the rate and direction of diffusion.

  
  

• Diffusion in gasses

Diffusion in gases is when gas molecules move from where there are a lot of them to where there are fewer. This happens naturally because gas molecules are always moving around randomly.

For example, if you open a bottle of perfume in one corner of a room, the smell eventually spreads throughout the room because the perfume molecules diffuse or spread out from where they were first released.