explain diffusion in solid with an example
Answers
The process of gradual mixing of two substances kept in contact is called diffusion.
Whenever diffusion takes place molecules of one substance penetrates through the spaces between the molecules of the other substance to equalise the concentration of molecules in the two substances.
Diffusion take place in solids, liquids and gases. But it is faster in gases than in liquids. It is slow in solids. It is because of diffusion you are able to get a fragrances of the perfumes and the flowers.
Diffusion of Solids into Solids Examples ::
If we write something on a black board and leave it uncleaned for a period say 10 - 15 days, we will find that it becomes quite difficult to clean the blackboard afterwards. This is due to the fact that some of the particles of chalk have diffused into surface of the board.
If two metals blocks are bound together tightly and kept undisturbed for a few years, then the particles of one metal are found to have diffused into the other metal.
The diffusion of a solid into solid is slow that so many people think that diffusion process doesn’t take place in solids at all.
Answer:
→ Alloy of metals is an example of the diffusion of a solid in another solid.