The boiling point of an azeotropic mixture of | vedclass

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(B) An azeotropic mixture that has a boiling point lower than both its individual components is known as a minimum-boiling azeotrope.This behavior is

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The mixture will show positive deviation from Raoult's law

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(B) An azeotropic mixture that has a boiling point lower than both its individual components is known as a minimum-boiling azeotrope.This behavior is characteristic of solutions that exhibit positive deviations from Raoult's law.In such cases:$(I)$ The experimental vapor pressure of the mixture is higher than the calculated value.$(II)$ The experimental boiling point of the mixture is lower than the calculated value.$(III)$ The enthalpy of mixing is positive,$\Delta_{mix} H > 0$.$(IV)$ The volume change upon mixing is positive,$\Delta V_{mix} > 0$.

The boiling point of an azeotropic mixture of water-ethanol is less than that of both water and ethanol. Then

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When do azeotropic mixtures of two liquids boil at a temperature lower than their boiling points?

Assertion : Azeotropic mixtures are formed only by non-$ideal$ solutions and they may have boiling points either greater than both components or less than both the components.
Reason : The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.

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