Chapter 11, Problem 11.45QP

(a)

Interpretation Introduction

Interpretation: The vapor pressure of Styrene and Ethylbenzene and their mass percentage in the solution at $90°\text{C}$ is given. The ratio of ethylbenzene to styrene in the vapor phase as the mixture first begins to boil is to be calculated and the temperature at which the first distillate comes to the top of the column is to be identified.

Concept introduction: The factor by which the vapor is enriched with ethyl banzene compared to styrene is calcyulated by the formula,

$\text{Factor}=\frac{\frac{\text{Moles}\text{of}\text{styrene}}{\text{Moles}\text{of}\text{ethyl}\text{benzene}}}{\frac{\text{Mass}\text{of}\text{styrene}\times \text{vapour}\text{pressure}\text{of}\text{styrene}}{\text{Mass}\text{of}\text{ethyl}\text{benzene}\times \text{vapour}\text{pressure}\text{of}\text{ethyl}\text{benzene}}}$

To determine: The vapor pressure of the solution of Styrene and Ethylbenzene.

(b)

Interpretation Introduction

To determine: The temperature at which the first distillate comes to the top of the column.