Nernst theorem

The Nernst theorem, also known as the Third Law of Thermodynamics, states that as the temperature of a perfect crystal approaches absolute zero (0 Kelvin), its entropy (disorder) approaches a constant minimal value, often zero. Essentially, this means that at very low temperatures, the material's disorder is minimized and becomes predictable. This principle helps us understand the behavior of materials at extremely cold conditions and sets fundamental limits on how entropy can change as temperature decreases, providing a foundation for thermodynamic calculations at near-zero temperatures.