Why does diffusion not work on Clouds?

Question

How come the diffusion phenomena does not work on clouds?

what I mean is, how come smoke usually spreads in a room away from the centre, while clouds do not do this, they actually clut together to make big clusters of clouds?

Answer 1

research it  

Answer 2

Good question. Water is dissolved in the air throughout the atmosphere (that is, water molecules are intimately mixed between nitrogen molecules and oxygen molecules).

But air temperature decreases with increasing altitude and clouds are the visible evidence of the water/air mixture having a higher dew point than the air temperature at a particular height.

This means that there are now too many water molecules for all of them to remain completely dissolved in the air. Liquid water comes out of solution and forms tiny droplets (a cloud). If these get time to coalesce, they will form rain.

Below that height the air temperature will be higher, and in all likelihood above the dew point, and so the water molecules can remain completely dissolved (and therefore invisible in the air). Any falling rain drops from above may well be re-dissolved at this height before they can reach the ground.

Air that has a lot of water dissolved in it is less dense than dry air (so a low-pressure area often means rainy weather)

Answer 3

Diffusion is countered and overcome by water's mutual attraction for itself IF there is enough water present.