what s principal of vaccum distillation under reduce pressure explain with fig.
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Answer : Principle : A liquid boils at a temperature at which its vapour pressure becomes equal to the atmospheric pressure. Thus, by decreasing the outer pressure, the boiling point also decreases and it gets distilled without decomposition.
Explanation : Vacuum distillation is distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in boiling points. This technique is used when the boiling point of the desired compound is difficult to achieve or will cause the compound to decompose.[1] Reduced pressures decrease the boiling point of compounds. The reduction in boiling point can be calculated using a temperature-pressure nomograph using the Clausius–Clapeyron relation.