What is the study of the changes in the energy that accompanies chemical reactions and physical changes? Chemistry Thermochemistry Energy Change in Reactions 1 Answer anor277 May 15, 2017 This is called #"thermochemistry.............."# Explanation: Which is a subset of #"thermodynamics"#. Thermochemistry is the study of enthalpy and entropy change that occur in physical and chemical transformations. Answer link Related questions Why do endothermic reactions happen? What causes energy changes in chemical reactions? How do endothermic reactions absorb heat? How can endothermic reaction be spontaneous? How do I relate equilibrium constants to temperature change to find the enthalpy of reaction? What happens to particles when a substance gains energy and changes state? For an isothermal process, S = __________? If you seal the end of a syringe and push on the plunger, is that process isothermal? If so,... What is the difference between adiabatic process and isothermal process? During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the change in... See all questions in Energy Change in Reactions Impact of this question 5338 views around the world You can reuse this answer Creative Commons License