Q. 65.0( 1 Vote )

Write two differe

Answer :

Positive deviations:


(i) A ─ A interactions are stronger than A ─ B interactions, thus higher repulsive forces and hence a & B excape easily from the solution.


(ii) Dissolution of such components is endothermic in naure


(iii) Mixing volume is more than the original theoritcal total volume ΔVmix 0


(iv) Vapour pressure of the solution is higher than the individual components due to easy escape of volatile components.


(v) E.g. water-kerosene, acetone-benzene,etc.


Negative deviations:


(i) A ─ B interactions are stronger than A ─ A interactions, thus the attractive forces are stronger and cannot be excape easily.


(ii) Heat is releases on dissolution.


(iii) Mixing volume is less than the total volume of individual components, ΔVmix 0


(iv) Individual component vapour pressure is higher than solution.


(v) E.g. acetone-aniline, chloroform-benzene.


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