6 x 1 hour lessons

This module builds on earlier thermochemistry by introducing lattice enthalpies, Born–Haber cycles, entropy, and Gibbs free energy. You’ll learn to calculate and explain the energetics of ionic compound formation and dissolution, and determine whether reactions are thermodynamically feasible.

By the end of this module you will be able to: • define lattice enthalpy and describe its significance in ionic bonding • construct and interpret Born–Haber cycles • explain trends in lattice enthalpy and ionic stability • define and calculate enthalpy of hydration and solution • apply Hess’s Law to calculate enthalpy of solution • define entropy and explain its role in determining feasibility • calculate Gibbs free energy and predict reaction spontaneity • explain the significance of positive/negative ΔG values

Edexcel Specification Points: Topic 13 – Energetics II