The rate and extent of chemical change

    AQA
    GCSE

    This topic explores the kinetics of chemical reactions and the principles of dynamic equilibrium within closed systems. Students investigate how variables such as temperature, concentration, pressure, and surface area influence the frequency of effective collisions and the rate of reaction, interpreting these relationships through collision theory. The study extends to reversible reactions, requiring an understanding of how changing conditions alters the position of equilibrium and the yield of products, governed by Le Chatelier's principle.

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    Objectives
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    Key Terms
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    Learning Objectives

    What you need to know and understand

    • Calculating rates of reaction
    • Factors which affect the rates of chemical reactions
    • Collision theory and activation energy
    • Reversible reactions
    • Energy changes and reversible reactions
    • Equilibrium
    • The effect of changing conditions on equilibrium
    • The effect of changing concentration
    • The effect of temperature changes on equilibrium
    • The effect of pressure changes on equilibrium

    Key Terminology

    Essential terms to know

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