Question

Define azeotrope. What two types of azeotropes are there? Give examples.

Answer 1

Azeotropes are non-ideal solutions known as constant boiling mixtures.

these are mixtures of two liquids which boil at constant temperature and distill over the same composition.

they are of two types:

a) minimum boiling point azeotropes

b) maximum boiling point azeotropes

Azeotropes which boil at a temperature less than the that of pure liquids and shows positive deviation from ideal behaviour are known as Minimum boiling point azeotropes.

ex:mixture of ethanol and water.

Azeotropes which boil at a temperature more than that of pure liquids and show negative deviation from ideal behaviour are known as maximum boiling point azeotropes.

ex: nitric acid and water