Question

What is the density of O2 at 27^oC with pressure 1 atm?

(a) 1.1 g/L

(b) 1.3 g/L

(c) 1.5 g/L

(d) 1.7 g/L

The question was asked in quiz.

Question is taken from Ideal Gas Law in section Recycle, Bypass, Purge, Ideal Gases and Real Gases of Basic Chemical Engineering

Answer 1

Correct answer is (b) 1.3 g/L

Explanation: Molecular wt. of O2= 44 g, PV = nRT, => PV = (m/M)RT, => d = PM/RT = (1*32)/(0.0821*300) = 1.3 g/L.