Question

What gives rise to the pressure of a gas ?

Answer 1

Pressure is caused by the collisions between the atoms of gas and walls of the container as those atoms travel in the confined space. There are three ways to increase the pressure: ... More molecules mean more collisions. Like blowing more air into a balloon, the walls of the balloon get tighter.

Answer 2

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The collision of the particles with the walls of the vessels give rise to the pressure of the gas.