5 x 1 hour lessons

This module revises all the key standard enthalpy changes you’ll need to master, with focus on enthalpies of formation, combustion. You’ll strengthen your practical understanding of calorimetry and learn to interpret and evaluate experimental data. The module then focuses on applying Hess’s Law to a range of calculation types using both enthalpy cycles and enthalpy level diagrams—core exam skills that form the foundation for more advanced thermodynamic reasoning.

By the end of this module you will be able to: • define and interpret standard enthalpy changes including formation, combustion, hydration, solution, and neutralisation • perform calculations based on calorimetry data and identify sources of error • apply Hess’s Law using both enthalpy cycles and enthalpy level diagrams • use average bond enthalpies to estimate enthalpy changes in reactions

AQA Specification Points: 1.16 Enthalpy change 1.17 Calorimetry 1.18 Applications of Hess’s Law 1.19 Bond enthalpies