Galán-Díaz, Juan JoséRodríguez González, Julio Ramón2025-10-222025-10-222010Galán, J., & Rodríguez, J. (2010). Thermodynamic study of the process of micellization of long chain alkyl pyridinium salts in aqueous solution. Journal of Thermal Analysis and Calorimetry, 101(1), 359-364. https://doi.org/10.1007/s10973-009-0385-9https://hdl.handle.net/2183/46042Versión aceptada de: https://doi.org/10.1007/s10973-009-0385-9[Abstract]: The molality dependence of specific conductivity of pentadecyl bromide, cetylpyridinium bromide and cetylpiridinium chloride in aqueous solutions has been studied in the temperature range of 30–45 °C. The critical micelle concentration (cmc) and ionization degree of the micelles, β, were determined directly from the experimental data. Thermal parameters, such as standard Gibbs free energy ΔG0m, enthalpy ΔH0m and entropy ΔS0M, of micellization were estimated by assuming that the system conforms to the pseudo-phase separation model. The change in heat capacity on micellization ΔCp, was estimated from the temperature dependence of ΔH0m. An enthalpy–entropy compensation phenomenon for the studied system has been found.eng© Akadémiai Kiadó, Budapest, Hungary 2009Pentadecylpyridinim bromideCetylpyridinium bromideCetylpyridinium chlorideConductivityCritical micelle concentrationEnthalpy, entropy and standard Gibbs free energy of micellizationHeat capacityTemperature dependencejournal articleopen access10.1007/s10973-009-0385-9