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In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The Gibbs paradox deals with a faulty derivation of this quantity which erroneously suggests it is not an extensive variable. For a monatomic ideal gas, its value is given by the Sackur-Tetrode equation, while for a black hole it is proportional to the surface area of the event horizon. In general it is equal to Boltzmann's constant times the natural logarithm of the number of accessible states. According to the Second Law of Thermodynamics, it always increases in irreversible processes. Proposed by Rudolf Clausius and symbolized S, FTP, what is this measure of the disorder in a system
Output:
Science