Importance of sublimation
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One of the major applications of sublimation is chemical purification; very easy to separate/purify chemical compounds, those that can be sublimed under milder conditions form those that require harsher conditions; for example at different temperatures or in vacuum.
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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.
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