CAIE A Level Chemistry 9701 · Reaction kinetics
A reaction between two gases is carried out in a closed vessel of fixed volume. The pressure inside the vessel is increased by forcing more of one of the gaseous reactants into the vessel. The temperature is kept constant.
Suggest, in terms of collisions, why the rate of this reaction increases.
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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