Thermodynamics of Micellization of n-Alkyl Sulfates in an Alkaline Medium at Different Temperatures

✍ Scribed by Juan M. Ruso; Pablo Taboada; Victor Mosquera; Felix Sarmiento

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 77 KB
• Volume: 214
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6198

✦ Synopsis

Critical micelle concentrations (cmc) have been calculated from conductivity measurements at 293.15, 298.15, 303.15, 308.15, and 313.15 K for sodium n-decyl sulfate (SDES), sodium n-undecyl sulfate (SUNDS), and sodium n-dodecyl sulfate (SDS) in a medium of pH 10.0 and ionic strength 0.0312. Thermodynamic parameters of micellization, standard Gibbs energies (⌬G°m), standard enthalpies (⌬H°m), and standard entropies (⌬S°m), have been obtained by application of the model of Evans and Ninham in terms of hydrophobic and surface contributions.