Chapter 5, Problem 5C.7P

Interpretation Introduction

Interpretation: The results of the figure 5C.2 have to be reproduced by plotting $y_{\text{A}}$ against $x_{\text{A}}$ for several values of the ratio $p_{\text{A}}^{\ast }/p_{\text{B}}^{\ast }$ obtained by rearranging the equation 5C.4 in terms of $x_{\text{A}}$ and the ratio $p_{\text{A}}^{\ast }/p_{\text{B}}^{\ast }$.

Concept introduction: The total vapour pressure of two volatile liquids is calculated using the Rault’s law.  Rault’s law states that the vapour pressure of an ideal solution is directly related to the mole fraction of the solvent of the mixture.  This is represented by the formula as,

    $p_{\text{sol}}=p_{\text{A}}^{\ast }{x}_{\text{A}}+p_{\text{B}}^{\ast }{x}_{\text{B}}$