Thermodynamics - Khan AcademyThermodynamics is the study of heat, "thermo," and work, "dynamics." This series includes lessons about energy transfer during chemical and physical changes, and how we can predict what kind of changes will occur. Concepts covered in this tutorial include the laws of thermodynamics, internal energy, heat, work, PV diagrams, enthalpy, Hess's law, entropy, and Gibbs free energy.