Authors:J. Galán, J. Del Castillo, A. González-Pérez, V. Fuentes-Vázquez, and J. Rodríguez
The specific conductivities of dodecylpyridinium chloride have been
determinated in water-butanol/pentanol/hexanol solutions in the temperature
range of 10 to 35C, and butanol, pentanol and hexanol concentrations
up to 0.05 mol kg–1.
data the temperature dependence of the critical micelle concentration, (cmc),
was determined. The molar fraction of alcohol in the micelle was estimated
using the theory suggested by Motomura et al.
for surfactant binary mixtures. The standard Gibbs free energy of solubilization
of alcohols in the micelles was worked out using the phase separation model.
Authors:J. Galán, A. Gonzáles-Pérez, J. Del Cactillo, and J. Rodríguez
Electrical conductivity of aqueous solutions of dodecylpyridinium chloride and bromide have been determined. From these data
the critical micelle concentration (cmc) was determined. The thermal properties as standard Gibbs free energy, enthalpy and entropy of micellization was estimated
from a uncharged-phase separation model and enables to obtain another properties like heat capacity of micellization and the
relevant parameters in the minimum of temperature dependence of cmc. The enthalpy-entropy compensation was shown for the studied compounds.
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
Authors:Behbehani G. Rezaei, A. A. Saboury, E. Poorakbar, and L. Barzegar
JBU. The association equilibrium constant values, K a , as a function of free concentration of Cu 2+ , [Cu 2+ ] F , can be calculated as follows:
The standardGibbsfreeenergies as a function of Cu 2+ concentrations can be obtained as
Authors:J.K. Odusote, A.A. Adeleke, P.P. Ikubanni, O.S. Ayanda, J.M. Abdul, and R.A. Yahya
isotherm, and so on. The value and the sign of the standardGibbsfreeenergy obtained from any of the isotherm models can be used to evaluate the spontaneity of the corrosion reaction and nature of the bonding as either physisorption or chemisorption. 2
Authors:Munevver Zeynep Selcuk, Mehtap Safak Boroglu, and Ismail Boz
standardGibbsfreeenergy change ΔG° of 237 kJ/mol or 1.23 eV.
The band gap energy (E g ) of the photocatalyst should be greater than 1.23 eV to achieve water splitting. However, to use visible light effectively, the band gap energy should be smaller