Question

What is the molecular volume of air at normal boiling point?

(a) 29.89 cm^3/gm mole

(b) 39.89 cm^3/gm mole

(c) 49.89 cm^3/gm mole

(d) 59.89 cm^3/gm mole

I have been asked this question in examination.

The doubt is from Fick’s Law-1 in section Modes and Diffusion of Mass Transfer

Answer 1

The correct answer is (a) 29.89 cm^3/gm mole

For explanation: Air contains some dust particles due to which its molecular volume decreases by a small factor.