Q: 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.
This quantity and the change in free energy change are plotted on an Ellingham diagram. The conjugate variable of entropy is this quantity, which is related to surface tension by the Eotvos rule. It decreases for gases in the Joule-Thomson effect, and a voltage is created by differences in this quantity in the Seebeck effect. Pressure and this quantity appear on a phase diagram. Average kinetic energy depends on this quantity, which is constant in isothermal processes. For 10 points, name this quantity measured on scales named for Celsius and Fahrenheit.
A:
Science