The TP Ensemble

In this chapter we focus on the ensemble that describes a system in contact with a thermal reservoir and is subject to a constant pressure, i.e., the so called TP ensemble. Just like the canonical and microcanonical ensembles it accounts for conservative character of the thermrodynamic field, and allows for a general expression of the thermodynamic potential, i.e. the entropy. We study the ideal gas thermodynamics, and the fluctuation-dissipation relations.