Chapter 19, Problem 122A

Interpretation Introduction

Interpretation : Dalton’s law of partial pressure is to be stated.

Concept Introduction : The partial pressure exerted by each gas in a mixture refers to its individual contribution to the overall pressure.

Answer to Problem 122A

According to Dalton’s law of partial pressure, at constant volume and temperature, the overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the component gases.

Explanation of Solution

The total pressure in a gas mixture is the average of the partial pressures of the individual gases.

The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the component gases, according to Dalton's law of partial pressure, which states that at constant volume and temperature.

The mathematical expression for Dalton’s law is given as

  $P_{\text{total}}=P_1+P_2+P_3+\mathrm{...}$

Because each constituent gas exerts its own pressure that is independent of the pressure that the other gases are exerting, Dalton's law is valid.