Question

Mean free path depends on which of the following?

• A. Temperature
• B. Density of molecules
• C. Diameter of the molecule
• D. Both (b) and (c)

Answer 1

The correct option is D Both (b) and (c)

The mean free path or average distance between collisions for a gas molecule may be estimated from kinetic theory. Mean free path displays inverse proportionality to the density of molecules and molecular diameter.
${\lambda }_{mean}\propto \frac{1}{\text{density of molecule}}$
and ${\lambda }_{mean}\propto \frac{1}{d^2}$