Enthalpy of Solvation Correlations for Gaseous Solutes Dissolved in Chloroform and 1,2-dichloroethane Based on the Abraham Model Page: 5
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In P(at T) - In P(at 298.15 K) = trans (1/ T -1/ 298.15) (5)
at other temperatures from measured partition coefficient data at 298.15 K and the
solute's enthalpy of solvation, AHsolv, or enthalpy of transfer, AHtrans, between the two
condensed phases. The enthalpy of transfer needed in Eqn. 5 is defined as
AHtrans = AHsolv,Org - AHsolv,w (6)
the difference in the enthalpy of solvation of the solute in the specified organic solvent
minus its enthalpy of solvation in water. The above equations assume zero heat capacity
changes. There is considerable published experimental partition coefficient data for
solute transfer from water to water-immiscible (or partly miscible) organic solvents, such
as 1-octanol, cyclohexane and heptane.
To date we have derived correlations for estimating the enthalpies of solvation of
gaseous solutes in water, 1-octanol, heptane, hexadecane, cyclohexane, benzene, toluene,
carbon tetrachloride, dimethyl sulfoxide and propylene carbonate [1-4]. Each correlation
was based on experimental data for a minimum of 100 organic and inorganic solutes.
Eventually, we hope to develop mathematical expressions for predicting enthalpies of
solvation in most (if not all) of the organic solvents for which we have log K and log P
correlations. The present study concerns developing a AHsolv correlation for two
chloroalkane solvent molecules, chloroform and 1,2-dichloroethane.
Data Correlation and Computation Methods
Our search of the published chemical and engineering literature found a large
number of papers [5-65] that reported experimental partial molar enthalpies of solution of
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Mintz, Christina; Burton, Katherine; Acree, William E. (William Eugene) & Abraham, M. H. (Michael H.). Enthalpy of Solvation Correlations for Gaseous Solutes Dissolved in Chloroform and 1,2-dichloroethane Based on the Abraham Model, article, September 15, 2007; [Amsterdam, Netherlands]. (digital.library.unt.edu/ark:/67531/metadc155628/m1/5/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.