AP Chemistry · Thermochemistry 6.1 Endothermic and Exothermic Processes ↗6.2 Energy Diagrams ↗6.3 Heat Transfer and Thermal Equilibrium ↗6.4 Heat Capacity and Calorimetry ↗6.5 Energy of Phase Changes ↗6.6 Introduction to Enthalpy of Reaction ↗6.7 Bond Enthalpies ↗6.8 Enthalpy of Formation ↗6.9 Hess’s Law ↗