Question

what is sublimation and why do certain substances show this phenomena

Answer 1

Sublimation is the process by which a solid changes into its gaseous state without changing to its liquid state and vice versa.

The cause of sublimation is the very weak bond in between the molecules of a particular substance. Hence, it changes into its gaseous state on heating very mildly or at room temperature.

Example : Naphthalene, Ammonium chloride etc.

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Answer 2

Sublimation is a process in which a solid directly changes to gaseous state without converting to liquid state and vice versa is known as sublimation . Substances like camphor , ammonium chloride, iodine , etc show this phenomena