Physics 0625 · IGCSE · Kinetic particle model of matter

Kinetic particle model of matter — practice question

A balloon holds a fixed mass of gas.
(a)[2]

Explain, in terms of the momentum of molecules, how the gas inside the balloon produces pressure.

(b)[2]

Explain, in terms of molecules, why the gas pressure rises when the balloon volume decreases.

(c)[2]

Calculate the final pressure.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “impulse/change of momentum (of molecules) in a collision” …

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