This document contains a lesson plan on the Born Haber cycle. It begins with an introduction and test of previous knowledge. Then it presents the topic, explaining that the Born Haber cycle is named after Max Born and Fritz Haber, and shows how ionic compounds are formed from their constituent elements. It helps calculate lattice energies of ionic compounds. The document proceeds to define the Born Haber cycle, explain the reaction pathway diagram using enthalpy changes, and describes how to calculate lattice energy and enthalpy of formation from given data.