What is it called when a solid changes directly into a gas?
Ans 1:
Class : Class 2
A change of state from Solid to gas without changing to liquid state is called Sub Limation.
Ans 2:
Class : Class 8
Deposition is a thermodynamic process, a phase transition in which gas transforms into solid. The reverse of deposition is sublimation. One example of deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid.