sublimation can be applied as a process of separation to purify compounds.
sublimation can be applied as a process of separation to purify compounds.
when can sublimation be applied as a process of separation?
to purify compounds
sublimation is a technique used by chemists to purify compounds. a solid is typically placed in a sublimation apparatus and heated under vacuum. under this reduced pressure, the solid volatilizes and condenses as a purified compound on a cooled surface (cold finger), leaving a non-volatile residue of impurities behind. once heating ceases and the vacuum is removed, the purified compound may be collected from the cooling surface.
sublimation (phase transition)
sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase. sublimation is an endothermic process that occurs at temperatures and pressures below a substance's triple point in its phase diagram, which corresponds to the lowest pressure at which the substance can exist as a liquid. the reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase. sublimation has also been used as a generic term to describe a solid-to-gas transition (sublimation) followed by a gas-to-solid transition (deposition). while a transition from liquid to gas is described as evaporation if it occurs below the boiling point of the liquid, and as boiling if it occurs at the boiling point, there is no such distinction within the solid-to-gas transition, which is always described as sublimation.
sublimation (phase transition)