The pressure energy of an individual liqud particle

Abstract

The types of energies possessed by an elementary individual particle (EIР) in a volume of liquid under pressure are analyzed. It has been established that in addition to internal, kinetic and potential energy (in the field of gravitational forces), EIР has another additional type of energy. Moreover, the deeper the EIР is located in a resting liquid, that is, the greater the hydrostatic pressure, which is equal to the absolute pressure p of this EIР, the more work can be done when it rises, which means the more energy the EIР initially possesses. This type of energy possessed by any individual particle inside a liquid, depending on the absolute pressure p, is called baropotential energy. The introduction of the concept of baropotential energy makes it possible to formulate the first law of thermodynamics for open thermodynamic systems correctly and in a convenient form.