Chapter 6, Problem 6.16P

Interpretation Introduction

Interpretation:

The equation is given and Edmister’s formula for calculation of acentric factor should be derived as,

  $\omega =\frac{3}{7}\left(\frac{\theta }{1-\theta }\right)\log P_c-1$

                 ..(a)

Concept Introduction:

The acentric factor is defined as:

$\omega =-1.0-\log (P_r{}^{sat})T_{r=0.7}$

                 ....(b)

First convert the given equation into reduced temperature and pressures terms and then replace the constants also in terms of reduced conditions and normal boiling point condition. Find the value of $P_r{}^{sat}$ from it and put it on above equation.