Zeroth law of thermodynamics: The Zeroth Law of Thermodynamics states that

The Zeroth Law of Thermodynamics states that systems in thermal equilibrium are at the same temperature. The story of the Zeroth Law of Thermodynamics is unique. It’s a fundamental principle that was recognized after the first three laws of thermodynamics were already known. The name “ Zeroth ” comes from the fact that it needed to be placed before the First Law due to its foundational nature, even though it was discovered later. Ralph H. Fowler, a British physicist, introduced the term “ Zeroth Law ” in the 1930s. Before this law was formulated, scientists had already established the ... The zeroth law of thermodynamics states that if two systems are in thermal equilibrium with a third one, then the two are in thermal equilibrium with each other. It also means that the three systems are at the same temperature. The most remarkable part of the zeroth law is that it establishes temperature as an essential and quantifiable property of matter [1-4]. The Zeroth Law of Thermodynamics , the First Law of Thermodynamics , the Second Law of Thermodynamics , and the Third Law of Thermodynamics are the four laws of thermodynamics . The zeroth law of thermodynamics was created after the first three, which is an important distinction. However, there was considerable debate over whether it should be known as the fourth law or by another name. The problem arose because the new law effectively replaced the previous three statutes and gave a clearer ...