Raji Heyrovská

J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, 182 23 Prague 8, Czech Republic.
Tel.: +420 286581418, Fax: +420 286582307, E-mail: [email protected], URL: http://www.jh-inst.cas.cz/~rheyrovs

Received: 26 September 2003 / Accepted: 21 December 2003 / Published: 16 March 2004

Abstract: Recently, the author suggested a simple and composite equation of state by incorporating fundamental thermodynamic properties like heat capacities into her earlier concise equation of state for gases based on free volume and molecular association / dissociation. This work brings new results for aqueous solutions, based on the analogy of the equation of state for gases and solutions over wide ranges of pressures (for gases) and concentrations (for solutions). The definitions of entropy and heat energy through the equation of state for gases, also holds for solutions.

Keywords: concise equation of state for solutions; gas-solution analogy; partial dissociation; electrolytes; thermodynamic laws; entropy and heat.