Given the task definition and input, reply with output. 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 differential of this quantity, which is given in general by minus Boltzmanns constant times the thermodynamic temperature times the natural logarithm of the partition function, is non-positive for isothermal, isometric processes, so it is minimized for equilibria in constant-temperature, constant-volume systems. It gives the available useful energy from a closed system, so it is usually symbolized A from the German for work. The p-V Legendre transform of a similar quantity named for Gibbs, it is given by the internal energy minus the absolute temperature times the entropy. For 10 points, name this thermochemical quantity, a thermodynamic potential named for a German physicist.
Science