Question

If the mean free path of atoms is doubled then the pressure of gas will become

• A. $P/4$
• B. $P/2$
• C. $P/8$
• D. P

Answer 1

Answer: (B)

$P/2$

Answer 2

As $\lambda = \frac{1}{\sqrt{2}}\frac{kT}{\pi d^{2}P}$

∴ $P \propto \frac{1}{\lambda}$ i.e. by increasing λ two times pressure will become half.