Why does a gas push a pressure outwards on the walls of its container?
Question 1 Report
Why does a gas push a pressure outwards on the walls of its container?
Answer Details
Gas particles move rapidly and randomly in all directions. Each time a particle strikes the container wall it exerts a tiny force on it, and the enormous number of such collisions every second adds up to a steady force spread over the wall area, which is what we call pressure.
The particles do not stick to the wall or dissolve into it; they bounce off and travel on. Nor do they pull the wall inwards, because the forces of attraction between gas particles are negligible. Heating the gas makes the particles move faster, so collisions become both harder and more frequent and the pressure rises.
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