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Explore the Third Law of Thermodynamics, absolute zero, and their profound implications for physics, chemistry, and understanding the universe. What is Third Law of Thermodynamics? It describes the entropy sign of any substance as positive at temperatures higher than absolute zero. The third law of thermodynamics is defined as assigning an entropy equal to zero at absolute zero temperature (0 K) for any pure compound in a stable and perfectly crystalline state. This law allows for the expression of the absolute value of entropy in relation to internal energy. Learn how the third law of thermodynamics defines absolute zero and the entropy of a system as temperature approaches zero. Explore the consequences of this law for the universe, substances and thermodynamic processes.
