Rates of reactions
Chemistry · Unit 2 — Molecular interactions and reactions · Rates of chemical reactions
Learning objectives (10)
LO-1Analyse data and graphical representations of relative changes in the concentration, volume and mass against time to determine rate of reaction. (Order of reaction is not required.)LO-2Analyse energy profile diagrams for reactions with and without catalysts, to determine the enthalpy change and activation energy.LO-3Apply the collision theory to determine the effect of concentration, temper ature, pressure and surface area on the rate of chemical reactions.LO-4Calculate the rate of chemical reactions by measuring the rate of formation of products or the depletion of reactants. (Formula: rate of reaction = increase in product concentration (∆[P]) time taken or decrease in reactant concentration (−∆[R]) time taken)LO-5Describe activation energy (Ea).LO-6Explain how catalysts affect the rate of a chemical reaction.LO-7Explain how temperature, surface area, pressure (gaseous systems), concentration and the presence of a catalyst can affect the rate of the reaction.LO-8Explain the relationship between the strength and number of the existing chemical bonds, the magnitude of the activation energy and the rate of a chemical reaction.LO-9Sketch energy profile diagrams for reactions with and without catalysts.LO-10Sketch Maxwell-Boltzmann distribution curves for reactions with and without catalysts.
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