Name: Azeotropic Mixtures
Uploaded: 2019-07-19
Duration: 8 min 23 s
Description: Certain liquid mixtures have a definite composition and boil at a constant temperature. They are called azeotropes. Let’s explore the cause of their behaviour!

Question

Mixing acetone and chloroform occurs with reduction in volume. Name the type of deviation from Raoult's law shown by the above mixture and state whether the process is endothermic or exothermic.

Accepted Answer

The solution has negative deviation from Raoult's law because decrease in volume indicates strong intermolecular forces of interaction between the molecules of acetone and chloroform. This negative deviation results in reduction of volume of solution as well as the tendency of the molecule to escape from the liquid due to which vapour pressure of the solution decreases. This decrease in the escaping tendency results in increase in the boiling point of the solution. In case of negative deviation, contraction in the volume on mixing along with evolution of heat is expected. Hence, this process is an exothermic reaction.

Mixing acetone and chloroform occurs with reduction in volume. Name the type of deviation from Raoult's law shown by the above mixture and state whether the process is endothermic or exothermic.

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Azeotropic Mixtures

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