Question

In azeotropic mixture showing positive deviation from Raoult’slaw, the volume of mixture is *

Answer 1

Answer:

Minimum boiling azeotropes is formed by positive deviation from Raoult's Law. Example :- Ethanol ( water mixture containing 95 % (approx) ethanol by volume.

Answer 2

In an azeotropic mixture showing a positive deviation from Raoult’s law, the volume of the mixture is slightly greater than the total volume of the components

• For mixtures having positive deviation, the intermolecular force of attraction decreases.
• As a result the volume of the mixture will be slightly greater than expected.
• Minimum boiling point isotopes shows a positive deviation.
• Ethanol +  Acetone shows a positive deviation the Raoult's law.
• Acetone breaks some existing hydrogen bonds in the ethanol.
• So the intermolecular interactions become weak.
• #SPJ3