Question

Question 4
(a) The density of a gas can be calculated using p = ρRT/M . Derive this equation
using pV = nRT where p = pressure, V = volume, n = moles, T = temperature,
R = gas constant, ρ = density, M = molar mass (See Reader).
(b) Calculate the density of air at 150 oC and atmospheric pressure assuming a
composition (by volume) of 21% oxygen (O2), 78.03% nitrogen (N2) and
0.97% argon (Ar).
(c) Convert an air flow rate of 150 m3 per hour to the
(i) mass flow rate,
(ii) weight flow rate, and
(iii) oxygen mole flow rate.
(d) Calculate the average velocity of air flow described in section (c) through a
pipe of internal diameter 4 mm.

Answer 1