Chapter 6, Problem 6.66P

Interpretation Introduction

(a)

Interpretation:

Explain how would the mole fraction and temperature changes in the distillation column.

Concept introduction:

The Raoult’s law can be written as,

$\begin{array}{l}{y}_{i}P=x_i{P}_i{}^{*}\left(T\right)\\ y_i/x_i=P_i{}^{*}\left(T\right)/P\end{array}$

Where, x and y represent mole fractions of component in liquid and vapor, P is total pressure and P* is the vapor pressure.

Interpretation Introduction

(b)

Interpretation:

Calculate the temperature at stage 1 and the composition of vapor leaving this stage. Repeat the calculations for stage 2

Concept introduction:

The Raoult’s law can be written as,

$\begin{array}{l}{y}_{i}P=x_i{P}_i{}^{*}\left(T\right)\\ y_i/x_i=P_i{}^{*}\left(T\right)/P\end{array}$

Where, x and y represent mole fractions of component in liquid and vapor, P is total pressure and P* is the vapor pressure.

Interpretation Introduction

(c)

Interpretation:

Describe how to calculate the number of ideal stages for the given case.

Concept introduction:

The Raoult’s law can be written as,

$\begin{array}{l}{y}_{i}P=x_i{P}_i{}^{*}\left(T\right)\\ y_i/x_i=P_i{}^{*}\left(T\right)/P\end{array}$

Where, x and y represent mole fractions of component in liquid and vapor, P is total pressure and P* is the vapor pressure.