C2.4 Rates Of Reaction

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GCSE Chemistry (C2) Mind Map on C2.4 Rates Of Reaction, created by killthemoment on 07/26/2014.
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C2.4 Rates Of Reaction
1 C2.4.1 Rates Of Reaction
1.1 Changes in temperature, concentration of solution, gas pressure, surface area of solids and the presence of catalysts all affect the rates of reactions.
1.1.1 The rate of a chemical reaction can be found by measuring the amount of a reactant used or the amount of product formed over time.
1.1.1.1 Chemical reactions can only occur when reacting particles collide with each other and with sufficient energy. The minimum amount of energy particles must have to react is called the activation energy.
1.1.1.1.1 Increasing the temperature increases the speed of the reacting particles so that they collide more frequently and more energetically. This increases the rate of reaction.
1.1.1.1.1.1 Increasing the pressure of reacting gases increases the frequency of collisions and so increases the rate of reaction.
1.1.1.1.1.1.1 Increasing the concentration of reactants in solutions increases the frequency of collisions and so increases the rate of reaction.
1.1.1.1.1.1.1.1 Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate of reaction.
1.1.1.1.1.1.1.1.1 Catalysts change the rate of chemical reactions but are not used up during the reaction. Different reactions need different catalysts.
1.1.1.1.1.1.1.1.1.1 Catalysts are important in increasing the rates of chemical reactions used in industrial processes to reduce costs.
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