Chapter 13, Problem 74QAP

Interpretation Introduction

Interpretation:

The partial pressure of H₂ and number of moles of H₂ in the mixture should be calculated. Amount of zinc needed to produce that quantity of hydrogen should be calculated.

Concept Introduction:

According to Dalton’s law of partial pressure, if a container contains mixture of gases, the sum of partial pressures of all the gases present in the container is equal to the total pressure exerted on the wall of the container.

Thus, for three gases namely A, B and C with partial pressure ${\text{P}}_{\text{A}}$, ${\text{P}}_{\text{B}}$ and ${\text{P}}_{\text{C}}$ the total pressure will be:

${\text{P}}_{\text{T}}={\text{P}}_{\text{A}}+{\text{P}}_{\text{B}}+{\text{P}}_{\text{C}}$

Where P_T is the total pressure and P_A, P_B, P_C are partial pressures of gases A, B and C The Ideal gas law;

$\text{P}\text{V}=\text{n}\text{R}\text{T}$

Where, P = Pressure of the ideal gas (atm)

V = Volume of the ideal gas (L)

n = number of moles of ideal gas present (mol)

R = Universal gas constant (L atm/K)

T = Temperature in Kelvin (K).