1. In steam distillation, the liquid boils
when the sum of vapour pressure due to
organic liquid and due to water becomes
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in steam distillation,the mixture boils when the sum of vapour pressures of water and the organic liquid becomes equal to the atmospheric pressure.since the vapour pressure of water is appreciably higher than that of the organic liquid,it vaporizes at a temperature much lower than its normal boiling point
In this way,many organic compounds insoluble in water can be purified at a temperature well below the point at which decomposition occurs
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