Question

Gases expert pressure on the walls of the containing vessel.Why?​

Answer 1

Answer:

particles of a gas move in all possible directions in straight line.During their random motion they collide either each other and in wall of container.Pressure is exerted by gas as a result of collision of particle on wall of container.

Explanation:

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Answer 2

Answer:

as particles move freely in all directions because of high kinetic energy, the force exerted by the moving particles per unit area in the walls of the container is the reason.