Nernst’s theorem

Nernst’s theorem, also known as the third law of thermodynamics, states that as the temperature of a perfect crystalline substance approaches absolute zero, its entropy (a measure of disorder) approaches a constant minimum, often zero. Essentially, at absolute zero, the material would have a perfectly ordered structure with no randomness, meaning there is no way for it to become any more ordered. This principle helps scientists understand the behavior of materials at extremely low temperatures and provides a reference point for measuring entropy changes in thermodynamic processes.