Use a calorimeter to measure temperature change
Calculate heat absorbed or released using q = mcΔT
Determine the reaction enthalpy from q at constant pressure
Use the relation ΔH = q_p
Apply Hess’s law by adding known enthalpy changes of related reactions
Use standard enthalpies of formation with ΔH°rxn = ΣΔH°f(products) – ΣΔH°f(reactants)
Use bond enthalpies with ΔHrxn = Σ(bonds broken) – Σ(bonds formed)
Convert measured heat to per mole of reaction
Report the enthalpy change with units, usually kJ/mol