• Dr. Mayank

In order to understand the colloidal behaviour of anionic surfactants in mixed solvents, a systematic study on the conductance in aqueous and mixed solvents have been made to determine the CMC, investigate the validity of various equations in these systems and to evaluate the various thermodynamic parameters for their association process. The CMC is defined as a concentration above which any added surface active agent molecules appear with high probability as micellar aggregates. Micelle formation (micellization) is regarded as a phase separation starting at CMC, which represents the saturation concentration of the phase containing single molecules of surface active agents. Although, this approach explains some features of the micelle formation, the available experimental evidences seem to be in agreement with the former one. The thermodynamic principles underlying micelle formation are conceptually simple. The hydrophobic effect provides the driving force for aggregation, whereas repulsion between head groups limits the size that a micelle can attain. The conductance behaviour of Sodium decyl sulfate and Potassium decyl sulfate surfactants in alcoholic and water systems have been studied .The standard Gibbs energy change(∆Go) ,enthalpy change (∆Ho) standard entropy change (∆So) for micellization process have been derived .

Sodium decyl sulfate, Potassium decyl sulfate, CMC, Micelles, conductivity, anionic surfactants, alcohol-water system, entropy, Gibb`s free energy, enthalpy.

"Study of Thermodynamic Parameters on the Micellar Behaviour of Sodium Decyl Sulfate and Potassium Decyl Sulfate (Anionic Surfactants) in Alcohol+ Water Systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.f325-f330, December-2021, Available :http://www.jetir.org/papers/JETIR2112542.pdf

"Study of Thermodynamic Parameters on the Micellar Behaviour of Sodium Decyl Sulfate and Potassium Decyl Sulfate (Anionic Surfactants) in Alcohol+ Water Systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. ppf325-f330, December-2021, Available at : http://www.jetir.org/papers/JETIR2112542.pdf