Discuss Diffusion in Solids With Example.

1.	Discuss Diffusion in Solids With Example.
Answer» ➢ Diffusion in solids is a very, very slow process. Example : ➢ If we write something on a blackboard and leave it uncleaned for a considerable period of time (say, at least 10 to 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 the surface of backboard. ➢ If two metal 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. Gases diffuse very rapidly. The rate of diffusion of a gas varies inversely as the square root of its density.

Answer»

➢ Diffusion in solids is a very, very slow process.

Example :

➢ If we write something on a blackboard and leave it uncleaned for a considerable period of time (say, at least 10 to 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 the surface of backboard.

➢ If two metal 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.

Gases diffuse very rapidly. The rate of diffusion of a gas varies inversely as the square root of its density.

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