Energy changes in chemical reactions (Higher tier)
This higher tier PowerPoint lesson provides an overview of energy changes in reactions, including bond energy calculations, definitions and diagrams to identify the differences between exothermic and endothermic reactions and examples of two-step reactions (oxidising copper, burning hydrogen), as well as a summary of the effect of catalysts.
Suitable for year 10 and year 11 GCSE chemistry students, there are three example, exam-style questions to challenge students.
Example questions:
Work out the overall energy change (enthalpy) per mole when hydrogen burns in oxygen. State whether the reaction is exothermic or endothermic.
Work out the overall energy change (enthalpy) per mole when copper reacts with oxygen. State whether the reaction is exothermic or endothermic.
