Question

If the pressure in a closed vessle is reduced by drawing out some gas the mean-free path of molecules

• A. losing their kinetic energy
• B. sticking to the walls
• C. changing their momenta due to collision with the walls
• D. getting accelerated towards the wall

Answer 1

The correct option is C changing their momenta due to collision with the walls

Since reduced pressure will result in the reduction of collision with the walls, average momentum will change and hence the mean free path.