Nernst heat theorem

The Nernst heat theorem, often associated with the third law of thermodynamics, states that as a system approaches absolute zero (0 Kelvin), the entropy, or disorder, of a perfect crystal approaches zero. This implies that at absolute zero, a perfect crystal would have a completely ordered state, with no randomness. In practical terms, it suggests that it's impossible to reach absolute zero through any finite number of steps, and as we cool materials, their behavior becomes more ordered, eventually leading to a limit where we can’t remove more heat without changes in state or structure.