Question

what is diffusion explanation​

Answer 1

Answer:

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place. Diffusion is an important process for living things; it is how substances move in and out of cells.

Answer 2

Explanation:

You walk into a coffee shop and immediately smell coffee. Why?

One reason is convection. Moving currents of air carry coffee smell particles all around the coffee shop.

But even without convection, the smell would still reach you eventually - not by convection, but by diffusion. In diffusion, coffee particles move from the coffee machine (an area of high concentration) to the rest of the coffee shop (an area of low concentration).

Making a cup of coffee also involves the diffusion of coffee particles through hot water:

In gases and liquids, particles move randomly from place to place. The particles collide with each other or with their container. This makes them change direction. Eventually, the particles are spread through the whole container.

Diffusion happens on its own, without stirring, shaking or wafting.