In Chapter 4, we expand the Energy-Interaction Model to include thermodynamics, connecting macroscopic properties like pressure, volume, and temperature to internal energy changes. We explore work don...In Chapter 4, we expand the Energy-Interaction Model to include thermodynamics, connecting macroscopic properties like pressure, volume, and temperature to internal energy changes. We explore work done on fluids, the Ideal Gas Law, and introduce key thermodynamic concepts, such as enthalpy and heat capacity. The Second Law of Thermodynamics is introduced, linking entropy to probability, highlighting how energy disperses in natural processes.