why is smoke filling up a room diffusion or not diffusion

Smoke filling up a room is an example of diffusion. Diffusion is the process by which particles move from an area of higher concentration to an area of lower concentration. In the case of smoke filling up a room:

1. Higher Concentration to Lower Concentration: The smoke particles are initially released from a source (such as a burning object) into a localized area, creating a region with a higher concentration of smoke particles.
2. Movement of Smoke Particles: Due to random motion, the smoke particles will spread out and move from the region of higher concentration to areas with lower concentrations.
3. Uniform Distribution: Over time, as the smoke particles continue to move and spread out, they become more uniformly distributed throughout the room. This process is driven by the tendency of particles to move to areas of lower concentration, leading to a state of equilibrium.