ChemInform Abstract: Preferential Solvation and Hydrophobic Hydration of Polyols in Mixtures of Water and NN-Dimethylformamide (enthalpies of solution of ethylene glycol, glycerol, meso-erythritol, xylitol, D-, L-arabitol, ribitol, D-sorbitol, and D-manni

1986 ◽  
Vol 17 (10) ◽  
Author(s):  
R. W. BALK ◽  
G. SOMSEN
Keyword(s):  
Ethylene Glycol ◽  
Preferential Solvation ◽  
Hydrophobic Hydration ◽  
Enthalpies Of Solution

Enthalpies of solution of urea in water–alkanol mixtures and the enthalpic pair interaction coefficients of urea and several nonelectrolytes in water

1986 ◽  
Vol 64 (9) ◽  
pp. 1721-1724 ◽  
Author(s):  
Henryk Piekarski ◽  
Gus Somsen
Keyword(s):  
Heat Capacity ◽  
Hydrophobic Hydration ◽  
High Water ◽  
Pair Interaction ◽  
Heat Capacity Change ◽  
High Water Content ◽  
Enthalpies Of Solution ◽  
Interaction Coefficients ◽  
Enthalpic Pair Interaction Coefficients ◽  
Capacity Change

Enthalpies of solution of urea in binary mixtures of isopropanol, s-butanol, and ethoxyethanol with water have been measured at high water content. Those in the binaries isopropanol + water and ethoxyethanol + water show endothermic maxima at 8 and 4 mol% alkanol, respectively. Enthalpic pair interaction coefficients are calculated for the interactions between urea and the alkanols and discussed in connection with these coefficients for interactions between urea and other nonelectrolytes and between N,N-dimethylformamide and several nonelectrolytes. The enthalpic pair interaction coefficients correlate linearly with the heat capacity change on hydration of the nonelectrolytes and with the enthalpy of hydrophobic hydration of the alkanols.

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