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

Question

If the pressure in a closed vessel is reduced by drawing out some gas. the mean-free path of the molecules (A) is decreased (B) is increased (C) remains unchanged (D) increases or decreases according to the nature of the gas

Tardigrade Admin · Accepted Answer

The mean-free path of molecule is the distance traveled by a molecule in two consecutive collision. If pressure is reduced and there are less particle then a molecule will travel longer distance before collision, so mean free path is increased.

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

is decreased

is increased

remains unchanged

increases or decreases according to the nature of the gas

The mean-free path of molecule is the distance traveled by a molecule in two consecutive collision. If pressure is reduced and there are less particle then a molecule will travel longer distance before collision, so mean free path is increased.