Abstract
This paper reports that various thermodynamic properties in aqueous media for certain individual ions and for compounds are linear functions of the inverse cube root of the solid respective ionic and compound solid state volumes, Vm−1/3.
Highlights
The primary aim of this paper is to investigate whether the inverse cube root of the formula unit volume, VmÀ1/3 of solid state species correlates with any of the thermodynamic functions associated with hydration (e.g. DhydHo or DhydGo or any of the more complex functions)
There are several advantages if this were to be the case. It would bring the thermodynamic functions associated with hydration under the remit of Volume Based Thermodynamics (VBT)
VBT has been used to investigate the energetics of defence materials[36] of current interest. We have found it possible to make thermodynamic predictions regarding the formation of such new materials
Summary
Absolute ion hydration enthalpies and the role of volume within hydration thermodynamics†. This paper reports that various thermodynamic properties in aqueous media for certain individual ions and for compounds are linear functions of the inverse cube root of the solid respective ionic and compound solid state volumes, VmÀ1/3. This is similar to the situation which has been fully exploited in solid state thermodynamics and out of which volume-based thermodynamics, VBT, evolved. A short resume of these various VBT applications is provided for the general reader and an improved lattice potential energy equation emerges using the state of the art data presented in this paper
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