Final answer:
Diffusion is the process by which molecules spread out evenly from areas of higher concentration to lower concentration.
Step-by-step explanation:
The uniform spreading out of molecules due to their random intermingling is known as diffusion. This process allows molecules to move from areas of higher concentration to lower concentration until they are evenly distributed through the medium. In gases, the Maxwell-Boltzmann distribution describes the predictable distribution of molecular speeds based on the kinetic theory. Diffusion continues until a dynamic equilibrium is reached where there is no net movement of molecules, though individual molecules continue to move randomly.