Question

Answers in brief.

Describe the principles of the following separating techniques.
c) Sublimation

Answer 1

• Sublimation is the transformation of a solid into vapors upon heating directly without going into a liquid state.
• An example, ammonium chloride undergoes sublimation.

Principle of sublimation:

• Sublimation is the transformation of a solid into a gas without passing through the liquid state.
• The contrast between the sublimable & non-sublimable natures of solids provides the basis for sublimation.
• It works on the principle that solids with very weak intermolecular interactions have a higher vapor pressure than usual.
• That allows them to transition into vapor immediately.