Chapter 5, Problem 5.40P

Interpretation Introduction

Interpretation:

The reason for the higher density of dry air as compared to moist air is to be calculated.

Concept introduction:

Density is defined as mass per unit volume. Mass and volume are physical quantities and the units of mass and volume are fundamental units. Density is the ratio of mass to the volume. The unit of volume is derived from the units of mass and volume. The SI unit of density is ${\text{kg/m}}^{\text{3}}$.

The expression to relate the density of the gas and the molecular mass of gas is as follows:

  $d=\frac{PM}{RT}$

Here,

$P$ is the pressure.

$M$ is the molecular mass.

$T$ is the temperature.

$d$ is the density of the gas.

$R$ is the gas constant.