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AQA GCSE Chemistry Energy Changes: 4 Lesson Unit

This GCSE Chemistry Foundation Tier PowerPoint bundle provides a comprehensive series of lessons on energy changes in chemical reactions, including exothermic and endothermic reactions, reaction profiles, bond energy calculations, and required practicals. Designed for AQA GCSE Chemistry students, this bundle includes detailed explanations, practical investigations, visual diagrams, and exam-style questions to support learning and assessment preparation. What’s Included in the Bundle? Lesson 1: Exothermic and Endothermic Reactions * Definition of exothermic and endothermic reactions and how they involve energy transfer. * Examples of exothermic reactions (combustion, neutralisation) and endothermic reactions (photosynthesis, thermal decomposition). * Practical examples of energy transfer, including hand warmers, self-heating cans, and sports ice packs. Lesson 2: Required Practical – Temperature Changes * Step-by-step guide to investigating temperature changes in neutralisation reactions. * How to classify reactions as exothermic or endothermic using temperature changes. * Risk assessment, apparatus list, and full method for accurate experimentation. * Graphing and data analysis – how to plot and interpret temperature change graphs. * Evaluation of experimental errors and improvements. Lesson 3: Reaction Profiles * Understanding reaction profiles (energy level diagrams) for exothermic and endothermic reactions. * Definition of activation energy and how it affects the rate of reactions. * How to label energy of reactants, energy of products, activation energy, and overall energy change on a reaction profile diagram. * The role of catalysts in reducing activation energy and increasing reaction rates. Lesson 4: Bond Energy Calculations and Energy Changes * How bond breaking is endothermic and bond making is exothermic. * Explanation of why reactions are exothermic or endothermic based on energy required to break bonds vs energy released when forming bonds. * Step-by-step worked examples of bond energy calculations. * How to determine if a reaction is overall exothermic or endothermic using bond energies. * Exam-style practice questions and calculations to reinforce understanding. Why Use This Resource? * Designed for AQA GCSE Chemistry students. * Fully editable PowerPoint (.pptx) files for easy adaptation. * Clear explanations, structured lessons, and engaging visuals. * Supports practical work and energy change calculations. * Includes exam-style practice questions and activities to reinforce key concepts. Last updated: February 2025. This bundle is ideal for teachers, tutors, and students looking for a complete, curriculum-aligned set of lessons on energy changes in chemical reactions. Download now to enhance your chemistry teaching!