Chapter 7, Problem 7.13CP

Interpretation Introduction

Interpretation:The fugacity coefficient of the gas for the system containing argon gas at pressure ${\text{P}}_{\text{1}}$ and temperature ${\text{T}}_{\text{1}}$ needs to be determined.

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

  $\text{P}\times \text{V = n}\times \text{R}\times \text{T}$

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