5. Thermochemistry Last updated Jun 23, 2019 Save as PDF 4.E: Exercises 5.1: The Nature of Energy Page ID39093 ( \newcommand{\kernel}{\mathrm{null}\,}\) 5.1: The Nature of Energy5.2: The First Law of Thermodynamics5.3: Enthalpy5.4: Enthalpy of Reaction5.5: Calorimetry5.6: Hess's Law5.7: Enthalpies of Formation5.8: Foods and Fuels5.E: Exercises