Chapter 4, Problem 4.8DQ

Interpretation Introduction

Interpretation:

The significance of a partial molar quantity and its dependence to the composition has to be explained.

Concept introduction:

Partial molar quantity is a thermodynamic quantity which indicates how an extensive property of a mixture or solution varies with changes in the molar composition of the mixture at constant temperature and pressure. These quantities are usually indicated by the lower case letter.

For example,

$\begin{array}{c}{v}_i={\left(\frac{\partial V}{\partial n_i}\right)}_{T,P,n_{i,j}}\\ n_i{v}_i=V\end{array}$

This is the partial molar volume of component i.