Excess enthalpies of solution of primary and secondary alcohols in dodecyldimethylamine oxide micellar solutions

Journal Article · Sun Nov 01 04:00:00 EST 1987 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00650998· OSTI ID:6977729

Milioto, S; Romancino, D; De Lisi, R

The excess enthalpies of solution with respect to water of some primary and secondary alcohols in dodecyldimethylamine oxide (DDAO) micellar solutions were measured by mixing aqueous solutions of alcohols with surfactant solutions. Standard free energies, enthalpies and entropies were obtained from the distribution of alcohol between aqueous and micellar phases. It is shown that thermodynamics of transfer of secondary alcohols from aqueous to the DDAO micellar phase differ slightly from those of their corresponding primary alcohols, that the additivity rule holds for free energies of transfer and that enthalpy and entropy display convex curves. The present data are compared with those from the aqueous to the dodecyltrimethylammonium bromide (DTAB) micellar phases and to the literature data for transfer from water to octane. The role of the hydrophilic interactions between OH group and the micellar head groups and of the hydrophobic interactions between the methylene group and its apolar environment is evidenced.

• Research Organization: Universita di Palermo (Italy)
• OSTI ID: 6977729
• Journal Information: J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 16:11; ISSN JSLCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
AMINES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
AQUEOUS SOLUTIONS
BINDING ENERGY
BUTANOLS
CALORIMETRY
DISPERSIONS
ENERGY
ENTHALPY
ENTROPY
ETHANOL
FREE ENERGY
HALIDES
HALOGEN COMPOUNDS
HEXANOLS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
METHANOL
MICELLAR SYSTEMS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PENTANOLS
PHYSICAL PROPERTIES
PROPANOLS
QUATERNARY COMPOUNDS
SOLUTION HEAT
SOLUTIONS
SOLVENT PROPERTIES
SOLVENTS
SURFACTANTS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
WATER