CAIE A Level Chemistry 9701 · States of matter
A sealed rigid container is filled with a gas. The gas exerts a pressure on the inner surfaces of the container.
(a) Suggest, in terms of the motion of the gas molecules, why the gas exerts a pressure on the container walls.
(b) Suggest two reasons why this gas would not behave as an ideal gas if the pressure were increased to a very high value at constant temperature.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
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