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To investigate how particle size affects reaction rates


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To investigate how particle size affects reaction rates

... Chemistry Coursework Purpose : To investigate how particle size affects reaction rates Key factors> Temperature> Particle size> Concentration> Measurements> Pressure> Catalysts Background information A chemical reaction involves one or more substances (reactants) that react to produce other substances (products). Chemical engineers exploit chemical reactions to produce materials on a commercial scale. Different reactions happen at different speeds (rates.) Some reactions like explosives are so fast they are almost instantaneous. For example, when a burning splint is put into a mixture of hydrogen and chlorine, there is a loud bang and hydrogen is produced: H2 (g) + CL2 (g) ? 2HCL (g) Other reactions, like the rusting of steel and the weathering of limestone on buildings happens so slowly that it may be years or even centuries before we notice their effects. The following is the way to work out the reaction rate: Reaction rate = Change in amount (or concentration) of a substance Time taken E.g. 0.1g

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