Abstract

It is known that the basic task of statistical physics is calculating the mean value of thermodynamic parameters, determining the macroscopic state of a system, the relation (the equation of state) between them, and also thermodynamic coefficients, measured on test. However, inasmuch as the immediate determination of these parameters is impossible, auxiliary functions – thermodynamic potentials – are introduced in theory. If these functions are known, we can find the equation of a state and compute thermodynamic coefficients (see Chap. 2). Thus, the problem is reduced to finding the explicit form of thermodynamic functions, especially free energy (the Helmholtz potential).

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