Development of Abraham model expressions for predicting the enthalpies of solvation of solutes dissolved in acetic acid

ABSTRACT

Experimental data have been compiled from the published chemical and engineering literature on the enthalpies of solvation for 92 different inorganic gases and organic vapours in acetic acid. The compiled data are used to derive mathematical correlations based on the Abraham solvation parameter model. The derived expressions describe the experimental solvation enthalpies in acetic acid to within a standard deviation (SD) of 2.2 kJ mol⁻¹. Principal Component Analysis (PCA) on the five equation coefficients from a derived Abraham model correlation shows that acetic acid does not resemble hydroxylic solvents in terms of enthalpic interactions, but is more akin to moderately polar solvents such as ethyl acetate or acetone.

KEYWORDS:

• Enthalpies of solvation
• acetic acid solvent
• Abraham model correlations
• solute transfer processes

Acknowledgement

Damini Grover, Heidi Zettl, and Victoria Koshevarova thank the University of North Texas’s Texas Academy of Math and Science (TAMS) programme for a summer research award.