Mean Free Path

A certain ideal gas has a temperature 300 K and a pressure 5.0 xx 10^4 Pa. The molecules have a mean free path of 4.0 xx 10^(-7) m. If the temperature is raised to 350 K and the pressure is reduced to 1.0 xx 10^4 Pa the mean free path is then

Estimate the number of collisions per second suffered by a molecule in a sample of hydrogen at STP.The mean free path (average distance covered by a molecule between successive collisions)=1.38xx10^(-5)cm.

Two gaseous molecules A and B are traveling towards each other. Let the mean free path of the molecule be sigma and Z be the collision number with other molecules at pressure 1 atm . Answer the following questions If the mean free path is sigma at 1 atm pressure, then its value at 5 atm pressure is

Consider the following statements for air molecules in an air tight container. (I) the average speed of molecules is larger than root mean square speed (II) mean free path of molecules is larger than the mean distance between molecules (III) mean free path of molecules increases with temperature (IV) the rms speed of nitrogen molecule is smaller than oxygen molecule The true statements are :

An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true? (A) the mean free path of the molecules decreases. (B)the mean collision time between the molecules decreases. (C ) the mean free path remains unchanged. (D) the mean collision time remains unchanged.