Chapter 7, Problem 7.6CP

Interpretation Introduction

Interpretation: The significance of fugacity of gas with respect to the interaction between the molecules of the gas needs to be explained.

Concept Introduction: The ideal gas equation is the equation that gives the relations between P,V, n and T of gases. It can be written as:

  $PV=nRT$

Usually, gases do not follow ideal behavior under all conditions of pressure, temperature and volumes. The relation of P,V, n and T of real gases can be given by Vander Waals equation:

  $\left(\text{P + }\frac{{\text{n}}^{\text{2}}\text{a}}{{\text{V}}^{\text{2}}}\right)\left(\text{V- n b}\right)\text{ = nRT}$

Hence $\text{P = }\frac{\text{nRT}}{\text{ V-nb}}\text{ - }\frac{{\text{n}}^{\text{2}}\text{a}}{{\text{V}}^{\text{2}}}$