Chapter 13, Problem 13.111SP

Interpretation Introduction

Interpretation: Pressure of ${\text{CO}}_{\text{2}}$ over soft drink in the bottle before it was opened to be calculated and why this pressure is only approximate of the true value has to be explained.

Concept introduction:

Soft drink constructer added scratchy foam by forcing Carbon dioxide and water into soda at higher pressure.  When opening soda bottle, pressures of Carbon dioxide released to attain equilibrium with atmosphere.  Thus the soda foams releasing the carbon dioxide gas.

Henry’s law

Henry’s law states that dissolved gases in liquid are directly proportional to the partial pressure of the gas over the solution.

$\text{c = kP}$

Where,

$\text{c}$ is molar concentration of dissolved gas $\text{(mol/L)}$

$\text{k}$ is proportionality constant

$\text{P}$ is partial pressure of the gas over the solution $\text{(mol/L}\text{.atom)}$

The quantity of gas will dissolve in a solvent depends on how often the gas molecule colloid with the surface of the liquid and become attentive by the condensed phase occurs by utilizing kinetic molecular theory.

Henry’s law cannot be valid for gases at high pressure or if there is a reaction between solvent and dissolved gas.