The negative of the partial derivative of the grand canonical ensemble with respect to this quantity gives the average pressure.
The negative of the partial derivative of the grand canonical ensemble with respect to this quantity gives the average pressure. In the Diesel Cycle, this quantity is held constant during the process that immediately follows isentropic expansion. For a process in which this quantity is held constant, the work done on the system's surroundings is always equal to (*) zero; such a process is represented by a vertical line on an indicator diagram. An isochoric process holds this quantity constant, which is also held constant in Gay-Lussac's Law to illustrate the relationship between a gas's temperature and pressure. For 10 points, name this quantity which changes during thermal expansion, which is abbreviated V.
The negative of the partial derivative of the grand canonical ensemble with respect to this quantity gives the average pressure.
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