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Authors
Affiliations
1 Department of Chemistry, Government College, Hisar, 125001, IN
2 Jain P.G. College, Mujaffar Nagar (U.P.), 251001, IN
3 Department of Chemistry, D A V College, Dehradun, IN
4 Department of Chemistry, CCS Haryana Agricultural University, Hisar 125 004, IN
Source
Asian Journal of Research in Chemistry, Vol 5, No 1 (2012), Pagination: 34-37
Abstract
Critical micelle concentration (CMC), maximum surface excess concentration (Γmax), minimum area per molecule (Amin) at air-liquid interface of cetyl pyridinium chloride (CPC) in aqueous sodium chloride solutions have been, tensiometrically, determined at 288.15, 293.15 and 298.15 K. Thermodynamic parameters of micellization as well as of adsorption at air-liquid interface have been evaluated. Whereas micellization process is exothermic, adsorption of surfactant at the air-liquid interface is endothermic in nature. The latter process however becomes feasible owing to the predominant entropy gain.
Keywords
Critical Micelle Concentration, Tensiometrically, Micellization, Adsorption, Entropy.
