Azeotropic mixture
When an azeotropic mixture of liquids boils at a lower temperature?
April 3, 2011 by einfoadmin
Filed under F.Sc Chemistry
If azetropic mixture has boiling point less than either of pure components, then it means that the forces of attractions among the molecules of the components have become weaker as compared to the pure components. Weaker forces of attractions means greater vapour pressure. Greater vapour pressure means positive deviation from Raoult’s law.
- Read moreWhat represents the maxima or minima obtained in the temperature composition curve of a mixture of two liquids?
April 3, 2011 by einfoadmin
Filed under F.Sc Chemistry
When a graph is plotted between temperature and compositions of a pair of liquids, then for non-ideal solutions either maxima or minima is obtained. The solution corresponding to this maxima and minima point is called azeotropic mixture.
- Read moreWhat happens when a solute is dissolved in a solvent and the vapour pressure of the solution is decreased?
April 2, 2011 by einfoadmin
Filed under F.Sc Chemistry
When a solute is dissolved in a solvent, then the vapour pressure of the solution decreases. In order to equalize the vapour pressure equal to the external pressure, we have to increase the temperature at the stage of boiling liquid.In other words boiling point increases.
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