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Claire Weston 11K Chemistry Coursework An Investigation to Show How Temperature Affects the Rate of a Chemical Reaction Background Information A chemical reaction is affected by certain factors that determine the speed and strength of the reaction. These factors are: ? The temperature at which the reaction occurs ? Whether or not a catalyst is present ? The surface area of the reactants (if one of the reactants is solid) ? The concentration of the reactants During a chemical reaction, collisions (impact) between molecules/atoms take place. These collisions cause the chemical bonds within the reactants that 'bind' the molecules together, to break and reform, in different combinations, which form the new molecules of the reaction. Anything that increases the speed/amount of particles (molecules) available will increase the amount of collisions occurring, and therefore speed up the reaction. Likewise, any factor that reduces the number of collisions will slow the reaction. Temperature Increasing the temperature speeds up the rate of a...

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