Minimum boiling azeotropes

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Minimum boiling azeotropes:

These are formed in case binary liquid mixtures showing positive deviation form Raoult's law. For example, a liquid mixture 95.57 mass percent of ethyl alcohol and 4.43 mass percent of water represents a constant boiling azeotropes. This mixture boils at 351.1K which is less than the boiling point of both ethyl alcohol (351.3 K) and water (373 k). This is known as minimum boiling azeotrope because the partial vapour pressure of both the components are maximum. At it's boiling point, both water and ethyl alcohol distill over as if they are the constituents of pure liquid.

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