thermodynamic entropy

Thermodynamic entropy is a measure of the amount of disorder or randomness in a system, and is related to the number of possible ways in which the system's energy can be distributed among its particles. As the system undergoes changes, such as heating or cooling, the entropy typically increases, reflecting the tendency toward greater disorder. This increase in entropy is a fundamental concept in the study of thermodynamics, and is closely related to concepts such as energy, heat, and work.

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