Thermodynamic States

A thermodynamic state has to do with the particular quantities of the thermodynamic variables, and the relationship among them, often given by an equation of state.

   

Equations of state

These describe the relationship among the thermodynamic properties of a system.

Phases

These are components of a system which have unique combinations of thermodynamic variables Phases in equilibrium are not changing with time.

Equilibrium states

These are static states in which the quantity of matter, volume and density, pressure, and temperature are constantm uniform, and nunchanging throughout the system. Also, in which all phases are constant in time.

Other states

These are those in which there there is some kind of flow of matter or energy, or a distribution of density, pressure, and temperature within the system. These can be handled using laws of classical thermodynamics provided they are infinitesimal. Quasi-equilibrum states and steady states can be considered to some extent.


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© 2008 Thad Coons
Created 16 Feb 2008, Updated 20 Feb 2008