Asian Journal of Research In Chemistry

  • Year: 2012
  • Volume: 5
  • Issue: 1

Surface and Thermodynamic Properties of Cetyl Pyridinium Chloride (CPC) in Aqueous Sodium Chloride Solutions at Various Temperatures

  • Author:
  • Ram Partap1,, Neelam Swaroop2, D.K. Tyagi3, O.P. Yadav4
  • Total Page Count: 4
  • Page Number: 34 to 37

1Department of Chemistry, Government College, Hisar, 125001, India

2Jain P.G. College, Mujaffar Nagar (U.P.), 251001, India

3Department of Chemistry, D A V College, Dehradun India

4Department of Chemistry, CCS Haryana Agricultural University. Hisar 125 004, India

*Corresponding Author E-mail: rampartap@rediffmail.com

Online published on 7 February, 2013.

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