Hess' Law and Enthalpy Cycles

Energetics ( AS Level Chemistry)

5 Full Lessons on Energetics in AS Level Chemistry. See below for the lesson objectives **Lesson 1: Enthalpy and Reactions** LO1: To explain that some chemical reactions are accompanied by enthalpy changes that are exothermic or endothermic LO2: To construct enthalpy profile diagrams to show the difference in the enthalpy of reactants compared with products LO3: To qualitatively explain the term activation energy, including use of enthalpy profile diagrams **Lesson 2: Enthalpy Changes ** LO1: To know what standard conditions are LO2:To understand the terms enthalpy change of combustion, neutralisation and formation LO3:To construct balanced symbol equations based on the terms enthalpy change of combustion, neutralisation and formation. **Lesson 3: Bond Enthalpies** LO1: To explain the term average bond enthalpy LO2:To explain exothermic and endothermic reactions in terms of enthalpy changes associated with the breaking and making of chemical bonds LO3:To apply average bond enthalpies to calculate enthalpy changes and related quantities **Lesson 4: Calorimetry ** LO1:To determine enthalpy changes directly from appropriate experimental results, including use of the relationship q=mcΔT LO2:To know the techniques and procedures used to determine enthalpy changes directly using a coffee cup calorimeter LO3:To know the techniques and procedures used to determine enthalpy changes indirectly using a copper calorimeter **Lesson 5: Hess' Law & Enthalpy Cycles ** LO1: To state Hess’ Law LO2: To calculate the enthalpy change of a reaction from enthalpy changes of combustion using Hess’ Law LO3:To calculate the enthalpy change of a reaction from enthalpy changes of formation using Hess’ Law ***Declaimer: Please refrain from purchasing this popular resource for an interview lesson or a formal observation. This is because planning your own lessons, including using your own lesson PowerPoints, is a fundamental skill of a qualified/unqualified teacher that will be assessed during the scenarios outlined above***