Chapter 18.1, Problem 18.1P

Interpretation Introduction

Interpretation:

Density of gaseous ${\text{H}}_{\text{2}}$ at $\text{25°C}$ and $1\text{ atm}$ pressure has to be calculated and the result has to be compared with density of air under the same conditions.

Concept introduction:

Density:

Density is calculated by dividing mass of a species by its volume.

$\text{Density =}\frac{\text{Mass}}{\text{Volume}}$

Ideal gas law:

Volume of a gas occupied by n moles of gas has a pressure at temperature. It can expressed as,

$\text{PV = nRT}$

Where,

$\begin{array}{l}\text{P- Pressure of the gas}\\ \text{V-Volume of occupied gas}\\ \text{n- Number of moles of a gas (mol/L)}\\ \text{R- Ideal gas constant}\\ \text{T- temperature (Kelvin)}\end{array}$