Why does a gas exert a pressure on the walls of its container?

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Question

Why does a gas exert a pressure on the walls of its container?

Accepted Answer

Its particles collide with the walls — Award 1 mark. Each collision applies a small force, and the enormous number of collisions every second adds up to a steady pressure. Heating the gas makes the collisions more frequent and more forceful.

Answer

Its particles collide with the walls

Answer

Its particles bond chemically to the walls

Answer

Its particles are held in a fixed pattern against the walls

Answer

Its particles have no energy

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