We are to give reason for each answer. Thank you in advance. Questions are to be

Question

We are to give reason for each answer. Thank you in advance.

Questions are to be answered in full detail: Write true or false. ( a) Partial molar volume is defined as PTnt b) The volume of a solution at T and p is equal to the sum of the volumes of its pure components at T and p. The partial molar volume of a components i in a solution must equal the molar volume of the pure component . The SI units for partial molar volume are m3/mol. If part of a solution is wasted the partial molar volumes in the remaining solution are equal to the original minus the lost part. c) d) e) f The volume of a solution cannot be less than the volume of the pure solvent used to prepare the solution. g) The chemical potential of a component in a solution is a partial molar quantity. h) Partial molar volumes of components of a mixture vary with concentration. i) Partial molar volumes are always positive but molar volumes need not be. j) The Gibbs-Duhem equation applies only to binary mixtures. (10)

Explanation / Answer

a) True.

The partial molar volume of a substance X in a mixture is the change in volume per mole of X added to the mixture.

So, V= V(T, P, n1,n2..)

If T and P are constant,

V=V(n1,n2...)

V(an1,a n2, ...)= aV(n1,n2..)

V= n1V1 + n2V2+....

Vi = (dV/dni)T,P,nj!=i

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