Question
Question: On the basis of kinetic theory of gases, the gas exerts pressure because its molecules:...
On the basis of kinetic theory of gases, the gas exerts pressure because its molecules:
A
continuously stick to the walls of container.
B
suffer change in momentum when impinge on the walls of container.
C
continuously lose their energy till it reaches wall.
D
are attracted by the walls of container.
Answer
suffer change in momentum when impinge on the walls of container.
Explanation
Solution
Gas molecules are in constant random motion. When they collide with the container walls, their momentum changes (due to change in direction of velocity). This change in momentum, per unit time, results in a force on the walls. Pressure is defined as force per unit area, hence the continuous collisions cause the gas to exert pressure.