• The enthalpy change for a reaction that is carried out in a series of steps is equal to the sum of the enthalpy changes for the individual steps.

• Application of Hess’s Law to calculate enthalpy changes.

• Calculation of ΔH reactions using ∆H°f data.

• Determination of the enthalpy change of a reaction that is the sum of multiple reactions with known enthalpy changes.

• Enthalpy of formation data can be found in the data booklet in section 12.

• An application of Hess's Law is ΔH_reaction = Σ(ΔH^°_{f products)} - Σ(ΔH^°_{f reactants)}