Lesson Plan: Standard Enthalpy Changes Chemistry

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to describe different types of standard enthalpy changes and define them.


Students will be able to

  • define and describe the enthalpy of fusion, solidification, vaporization, and condensation and the relationship between them,
  • identify the location of the enthalpy of fusion and vaporization from heating curves or tabulated data,
  • define the enthalpy of solution and explain that dissolution results in a change in enthalpy,
  • relate enthalpy of dilution to the difference between two enthalpies of solution with differing quantities of solvent,
  • define and describe the enthalpy of combustion,
  • define and describe the enthalpy of formation and how it relates to a compound’s stability,
  • use the standard enthalpies of formation to calculate change in enthalpy for a reaction.


Students should already be familiar with

  • energy changes in reactions,
  • measuring enthalpy changes,
  • exothermic and endothermic reactions,
  • bond energy.


Students will not cover

  • Hess’s law,
  • thermodynamic derivations,
  • other thermodynamic quantities (e.g., entropy and Gibbs free energy).

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