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Isoenthalpic–isobaric ensemble

Statistical mechanics
Microcanonical ensemble
Canonical ensemble
Grand canonical ensemble
Isothermal–isobaric ensemble
Isoenthalpic–isobaric ensemble

The isoenthalpic-isobaric ensemble (constant enthalpy and constant pressure ensemble) is a statistical mechanical ensemble that maintains constant enthalpy H \, and constant pressure P \, applied. It is also called the NpH-ensemble, where the number of particles N \, is also kept as a constant. It was developed by physicist H. C. Andersen in 1980.[1] The ensemble adds another degree of freedom, which represents the variable volume V \, of a system to which the coordinates of all particles are relative. The volume V \, becomes a dynamical variable with potential energy and kinetic energy given by PV \,.[2]. The enthalpy H=E+PV \, is a conserved quantity.[3]


  1. ^ Andersen, H. C. Journal of Chemical Physics 72, 2384-2393 (1980).
  2. ^ Hwee, Chiang Soo. "Mechanical behavior of peptides in living systems using molecular dynamics."
  3. ^ Other Statistical Ensembles
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isoenthalpic–isobaric_ensemble". A list of authors is available in Wikipedia.
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