Degrees of Freedom Microscopic Interpretation of Internal Energy Potential Energy Contribution Definition of Internal Energy Adiabatic Process and Internal Energy Diatomic Gas Work Done Isochoric Process and Internal Energy Specific Internal Energy Isothermal Process and Internal Energy Internal Energy Dependence on Temperature Temperature Dependence Calorimetry and Internal Energy Internal Energy of an Ideal Gas State Function Internal Energy Units Change in Internal Energy First Law of Thermodynamics Extensive Property Monatomic Gas Work Done in Thermodynamic Processes Kinetic Energy Contribution Microscopic Interpretation Joule’s Law Equipartition of Energy