What is the difference between distillation,distillation under reduced pressure,and steam distillation?

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(N/A) The differences among distillation,distillation under reduced pressure,and steam distillation are summarized in the table below.
MethodDescription and Application
$1$. DistillationUsed for liquids that do not decompose on boiling and have sufficient difference in boiling points. Example: Separation of petrol and kerosene.
$2$. Distillation under reduced pressureUsed for liquids that decompose at their boiling point. Reduced pressure lowers the boiling point,preventing decomposition. Example: Purification of glycerol.
$3$. Steam distillationUsed for organic compounds that are steam volatile and immiscible in water. Example: Separation of aniline from water.

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