5 x 1 hour lessons

This module introduces key ideas in thermochemistry. You’ll learn the definitions and conventions of enthalpy change, apply Hess’s Law to calculate unknown values using cycles and enthalpy diagrams, and perform calorimetric calculations. These foundations prepare you for more advanced energetics in Module 4B.

By the end of this module you will be able to: • define standard enthalpy changes of combustion, formation, reaction, and neutralisation • calculate enthalpy changes from experimental calorimetry data • construct enthalpy cycles and level diagrams • apply Hess’s Law to find enthalpy changes indirectly • identify and explain sources of error in calorimetry experiments • use bond enthalpy data to estimate enthalpy changes • assess the limitations of mean bond enthalpy calculations

Edexcel Specification Points: Topic 8 – Energetics I