write the Positive deviations from Raoult’s law
Answers
Answer:
The solutions in which solute-solvent intermolecular attractions are weaker than those between solute-solute molecules and solvent-solvent molecules, exhibit positive deviations. The vapour pressures of such solutions are higher than those of pure components. The solutions of ethanol and acetone, carbon disulphide and acetone show positive deviations from the Raoult’s law.
Answer:
(1) A solution or a liquid mixture which has higher vapour pressure than theoretically calculated by Raoult's law or higher than those of pure components is called a nonideal solution with postive deviation.
(2) In these solutions. solute-$olvent intermolecular attractions are weaker than those between solvent-solvent and solute-solute interactions.
(i) For example, solutions of acetone and ethanol, carbon disulphide and acetone, etc.