
A ready-to-use GCSE Chemistry practical worksheet on exothermic and endothermic reactions for Edexcel separate (triple) science, SC19 Heat Energy Changes in Chemical Reactions. Includes the aim, “what should I know after this practical?” objectives, a full method with labelled diagrams, a results table and scaffolded exam-style questions.
Students use temperature data from a polystyrene-cup calorimeter to decide whether reactions are exothermic or endothermic, and explain why that apparatus is used.
What’s included: the aim and “what should I know after this practical?” objectives, a step-by-step method with labelled diagrams, a results table and scaffolded exam-style questions.
The PowerPoint is fully editable, so you can reword the questions, change the quantities to match the equipment in your prep room, or drop your own diagrams in.
Apparatus used: beaker, thermometer, polystyrene cup, hydrochloric acid.
How I use it: students complete the sheet during the practical and keep it for revision, which gives them a written record to revise from when practical questions come up in the exam. With the full method on the sheet, any non-specialist in the department can run the practical confidently.
Teaching combined science as well? The same practical, coded CC15 for the combined specification, is here: https://www.tes.com/teaching-resource/edexcel-gcse-chemistry-important-practical-cc15-energy-changes-13537130
Buying more than one? This practical is part of my Triple Chemistry Core Practicals bundle - all 14 for £19.00 instead of £35.00: https://www.tes.com/teaching-resource/triple-chemistry-core-practicals-edexcel-gcse-bundle-13538572
The layout matches my KS3 practical booklets (https://www.tes.com/teaching-resource/resource-13516197), so students arriving from Year 9 already know how the sheets work.
Last updated August 2026.
Credit: Diagrams created using Chemix.
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