AQA Jan 2011 Paper 2 Q2

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do not write outside the box the diagram below shows a maxwell boltzmann distribution for a sample of gas at a fixed temperature ea is the activation energy for the decomposition of this gas number of molecules with a given energy ea energy a i on this diagram sketch the distribution for the same sample of gas at a higher temperature marks a ii with reference to the maxwell boltzmann distribution explain why an increase in temperature increases the rate of a chemical reaction marks extra space wmp jan chem do not write outside the box b dinitrogen oxide n o is used as a rocket fuel the data in the table below show how the activation energy for the decomposition of dinitrogen oxide differs with different catalysts n o g n g o g without a catalyst with a gold catalyst with an iron catalyst with a platinum catalyst ea kj mol b i use the data in the table to deduce which is the most effective catalyst for this decomposition mark b ii explain how a catalyst increases the rate of a reaction marks extra space turn over wmp jan chem

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