Classical thermodynamics is a term that refers to the study of macroscopic systems in thermal equilibrium. It encompasses the study of heat, work, internal energy, and various thermodynamic properties. Some of the synonyms for classical thermodynamics include macroscopic thermodynamics, bulk thermodynamics, and continuum thermodynamics. These terms are all used to describe the same branch of physics that deals with the laws governing the behavior of macroscopic systems at equilibrium. Over the years, classical thermodynamics has become one of the cornerstones of physics and engineering, providing a foundation for the development of many modern technologies. Despite the different names given to this field, the principles of classical thermodynamics remain constant and applicable.