Chapter 4, Problem 4.12P

(a)

Interpretation Introduction

Interpretation:

To find the value of latent heat at T_n for given value at 0 o C by Watson Correction and to find the error between the calculated and the value in the table.

Concept Introduction:

Consider Chloroform for this case, we find latent heat, $\Delta H_2$ using Watson correction,

  $\frac{\Delta H_2}{\Delta H_1}={\left(\frac{1-T_{r2}}{1-T_{r1}}\right)}^{0.38}$

(b)

Interpretation Introduction

Interpretation:

To find the value of latent heat at T_n for given value by Riedel equation

To find the error between the calculated and the value in the table

Concept Introduction:

Consider Chloroform for this case, we find latent heat using Riedel equation below,

$\frac{\Delta H_n}{R{T}_n}=\frac{1.092(\ln P_c-1.013)}{0.930-T_{rn}}$

$\Delta H_n$ = latent heat at T_nR = Universal Gas constant

T_n = Temperature

P_c= Critical Pressure

$T_{r2}=\frac{T_n}{T_c}$

T_c= Critical Temperature