Thermodynamic State


Also found in: Wikipedia.

Thermodynamic State

 

the state in which a thermodynamic system exists. Thermodynamic states are characterized by a set of macroscopic properties, which determine the internal properties of a system in that state and the interaction of the system with external bodies. These properties include temperature, pressure, volume, electric polarization, and magnetization.

Among the thermodynamic state properties there exists a specific number of independent variables, equal to the number of thermodynamic degrees of freedom of the system; the remaining variables can be expressed in terms of the independent variables. Thus, in the equation of state for an ideal gas, pV = RT, two variables—for example, temperature T and volume V —are independent, and the third, the pressure of the gas p, can be found from T and V (R is the gas constant). In thermodynamics, a distinction is made between equilibrium states and nonequilibrium states; the latter are studied in the thermodynamics of irreversible processes.

References in periodicals archive ?
In this paper the thermodynamic state parameter coenthalpy is used as a direct exergy flow potential.
5) Joint retrievals of temperature and water vapor in studying the thermodynamic state of the atmosphere during record minimum sea ice extent years.
The dynamic nature of equilibrium requires an additional concept in order to describe the thermodynamic state of the system.
4,5 must have the probabilistic significance of thermodynamic state related to the current configuration of the diffusion system.
The shrink-fit barrel liners, the use of cartridge heaters, the optimized cooling system and the improved temperature control together bring about not only a considerable reduction in energy consumption but also an improvement both in the temperature control of the process section and in the entire thermodynamic state of the compounding process.
Figure 2(b) shows thermodynamic state points of the MGJT cycle for a nominal operating condition using a mixture with a molar composition of 9.
The relaxed state is a thermodynamic state that is experimentally accessible via relaxation tests since, according to De Donder [17], such a state generalizes Duhem's metastable state.
Simulations observe the behavior of a model system in a given thermodynamic state under atomic and/or molecular interaction rules (electron wave functions and/or force fields), which are given by the programmer to approximate the real interactions.
Point 1 represents the thermodynamic state of the air in cavity A in the coordinate system p-v (pressure-volume) (Fig.
The discrete simulation framework is represented by the novel Discrete Particle Method (DPM) that contrary to the classical Discrete Element Method predicts in addition to the kinematic also the thermodynamic state of individual particles in an ensemble.