In: Chemistry
Explain why it is a poor idea to vacuum filter a warm organic liquid
Under low pressure boiling point of organic liquid decreases and evaporation of liquid increases rapidly, heat from the solvent is lost due to latent heat of vapourisation, so the organic liquid under filtration gets cooled, because of cooling effect the organic compound dissolved in liquid may precipitate and hence effective filtration is not possible.
Boiling point of a liquid is the temperature at which the pressure of liquid becomes equal to atmospheric pressure, when vacuum is applied the external pressure decreased and hence liquid starts Boiling earlier at low temperature and hence evaporation increases