Why a mixture of Carbon disulphide and acetone shows positive deviation from Raoult’s law? What type of azeotrope is formed by this mixture?
Intermolecular forces of attraction between carbon disulphide and acetone are weaker than the pure components.
Minimum boiling azeotrope at a specific composition.
Detailed Answer:
When carbon disulphide is added to the acetone, the dipolar interaction between molecule of solute solvent (A – B) than the respective interaction between solute-solute (A – B) and solvent – solvent (B – B) weakens, which leads to increase in vapour pressure. Hence, shows positive deviation in vapour pressure from Raoult’s Law. Minimum boiling azeotrope at a specific composition is formed by this mixture.
Minimum boiling azeotrope at a specific composition.
Detailed Answer:
When carbon disulphide is added to the acetone, the dipolar interaction between molecule of solute solvent (A – B) than the respective interaction between solute-solute (A – B) and solvent – solvent (B – B) weakens, which leads to increase in vapour pressure. Hence, shows positive deviation in vapour pressure from Raoult’s Law. Minimum boiling azeotrope at a specific composition is formed by this mixture.
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