Chapter 3, Problem 3.31E

Interpretation Introduction

Interpretation:

The entropy of mixing to make $1\text{mol}$ of air from its constituent elements is to be calculated.

Concept introduction:

The term ‘entropy’ is used to represent the randomness in a system. When a system moves from an ordered arrangement to a less order arrangement, the entropy of the system increases. The entropy of mixing of gases is given below.

${\Delta }_{\text{mix}}S=-R{\displaystyle \sum _{i=1}^{\text{no}\text{.}\text{of}\text{gases}}{n}_i\ln x_i}$