Chapter 12, Problem 12.49QE

(a)

Interpretation Introduction

Interpretation:

The Henry’s law constant for acetylene in molal/torr has to be calculated.

Concept Introduction:

Henry’s law:  The solubility of a gas is directly proportional to its partial pressure at any given temperature.  At pressures of few atmospheres or less, the solubilities of gases obey henry’s law.  The expression for Henry’s law is given as,

  $\text{C=kP}$

Here, $\text{C}$=concentration of the gaseous substance in solution

    $\text{k}$=proportionality constant

    $\text{P}$=partial pressure of the gaseous solute in contact with the solution.

The unit of proportionality constant depends on the units of concentration and the pressure.

(b)

Interpretation Introduction

Interpretation:

The grams of acetylene dissolved in one kg of water at ${\text{20}}^{\text{o}}\text{C}$ and $\text{300}\text{torr}$ have to be calculated.

Concept Introduction:

Refer to part (a).