Chapter 4, Problem 4B.14P

Interpretation Introduction

Interpretation: The variation of the vapour pressure of a liquid of molar mass $M$ liquid with the depth has to be predicted.  The effect on the vapour pressure of water at $25{}^{°}\text{C}$ in a column of $10\text{m}$ height has to be estimated.

Concept introduction: The vapour pressure of the liquid increases as the additional pressure such as the atmospheric pressure on the liquid increases.  The relation between the additional pressure and the atmospheric pressure is given by the following formula.

    $p=p^{\ast }{\text{e}}^{\left(\frac{V_m\Delta p}{RT}\right)}$