Question
Physics Question on kinetic theory
If the pressure in a closed vessel is reduced by drawingbut some gas, the mean free path of the molecules
A
Decreases
B
increases.
C
Remains unchanged
D
Increases or decreases according to the nature of the gas
Answer
increases.
Explanation
Solution
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.