Fick's laws

Fick's laws describe how particles or molecules move from areas of high concentration to low concentration, a process called diffusion. The first law states that the rate of diffusion is proportional to the concentration gradient—the difference in concentration across a distance. This means particles tend to move faster when the concentration difference is larger. The second law predicts how the concentration changes over time, considering the diffusion rate and the medium's properties. In essence, Fick's laws help us understand and quantify how substances spread within gases, liquids, or solids.