Theorem of the matching states

In thermodynamics, the theorem of the corresponding states describes the requirement that an equation of state valid for all substances should exist.

The theorem is based on the assumption that characteristic state points such as the melting point , the boiling point or the critical point represent a uniformly definable state for all substances so that they can be used as reference points .

Examples of the application of the theorem of the corresponding states are the Van der Waals equation in its reduced form and Eötvös' rule . EA Guggenheim described the theorem in 1945 as "extremely useful and remarkably accurate". Today, the theorem is only valid for chemically related substances with parameters that do not differ too greatly from one another.

Individual evidence

↑ Wedler / Freund, 2012, 6th edition, Textbook of Physical Chemistry , Weinheim: Wiley-VCH, 278.
^ Edward A. Guggenheim: The Principle of Corresponding States . In: The Journal of Chemical Physics . tape 13 , no. 7 , 1945, ISSN 0021-9606 , p. 253-261 , doi : 10.1063 / 1.1724033 .
↑ Dieter Ziessow, Andreas Unkel: State behavior of real gases. Theorem of the matching states. In: Chemgaroo ChemgaPedia. Wiley Information Services, accessed January 27, 2014 .

[1] Wedler / Freund, 2012, 6th edition, Textbook of Physical Chemistry , Weinheim: Wiley-VCH, 278.

[2] Edward A. Guggenheim: The Principle of Corresponding States . In: The Journal of Chemical Physics . tape 13 , no. 7 , 1945, ISSN 0021-9606 , p. 253-261 , doi : 10.1063 / 1.1724033 .

[3] Dieter Ziessow, Andreas Unkel: State behavior of real gases. Theorem of the matching states. In: Chemgaroo ChemgaPedia. Wiley Information Services, accessed January 27, 2014 .