What is the density of air at 75 f and latm pressure? express in lbm/ft3 and kg/m3

Answer : The density of air in and is, and respectively.

Explanation :

where,

P = pressure of air = 1 atm

V = volume of air

T = temperature of air = 297 K

The conversion used for the temperature from Fahrenheit to degree Celsius is:

The conversion used for the temperature from degree Celsius to Kelvin is:

n = number of moles

m = mass of air

M = average molar mass of air = 28.97 g/mole

= density of air = ?

R = gas constant = 0.0821 L.atm/mol.K

Now put all the given values in the above formula, we get:

Now we have to calculate density in .

Conversion used :

So,

The density of air in is,

Now we have to calculate density in .

Conversion used :

So,

The density of air in is,