Dec 2, 2020 ·It allows for the possibility thatentropycan in theory decrease, just like it is always technically possible to flip all heads or all tails—it is simply very unlikely. In other words, while it is overwhelmingly likely for the universe’sentropyto increase, it is not necessary. Austrian physicist Ludwig Boltzmann explainedentropyas the measure of the number of possible microscopic arrangements or states of individual atoms and molecules of a system that comply with the macroscopic condition of the system. Sep 12, 2025 ·Entropy, themeasure of a system’s thermal energy per unit temperature thatisunavailable for doing useful work. Because work is obtained from ordered molecular motion, entropy is also a measure of the molecular disorder, or randomness, of a system.
