The process in which a solid changes into vapor without changing into liquid and from vapor changes into solid without changing into liquid is known as sublimation.
Generally solid first changes into liquid and then changes into gas because of rise in temperature. But there are many substances, which change into gas without changing into liquid and changes into solid from gas without changing into liquid. Such substances, which go under sublimation, are known as sublime.
For example – camphor, naphthalene balls, ammonium chloride, iodine, dry ice, etc.
The solid obtained after cooling of the gas of sublime is called Sublimate. The process of cooling of vapor of sublime to get sublimate is also known as ‘sublimation’ although it is also known as deposition.
When camphor is heated it changes into vapor without changing into liquid. When the vapor of camphor is cooled it changes into solid without changing into liquid.
