Question

How ice converts into vapours without heating?

Answer 1

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 withoutchanging into liquid. When the vaporof camphor is cooled it changes intosolid without changing into liquid.

Answer 2

The gets the heat energy from the surrounding that makes the ice to be converted into vapours this causes in the dry ice only which solid form of carbon dioxide.