Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The solubility of veramoss in n-Butyl alcohol, ethanol, isopropanol, ethyl acetate, acetone, tetrahydrofuran, isoamyl alcohol, n-amyl alcohol, n-propyl alcohol, DMF pure solvents and various {ethanol + water} mixtures at T = (283.15 to 333.15) K and atmospheric pressure were measured by using the dynamic method. The experiment solubility data showed that the solubility of veramoss increased with increasing temperature in all solvents selected and decreased with the rise of mole fraction of water in the binary solvent mixtures of {ethanol + water}. The modified Van t Hoff equation and the Apelblat model were successfully used to correlate the experimental solubility in pure solvents while the modified Apelblat model, the Van t Hoff equation and the CNIBS/R model were applied to correlate the solubility in binary solvent mixtures, and all of the models provided good fitting to the data. Furthermore, the thermodynamic parameters (dissolving enthalpy, dissolving entropy and Gibbs free energy) of veramoss in different solvents were also calculated based on the Wilson equation and experimental solubility data, the dissolving process of veramoss in all selected pure solvents were observed as an endothermic, non-spontaneous and an entropy-driven process, and in the binary solvent mixtures of {ethanol + water} were observed as an endothermic, spontaneous and an entropy-driven process. The data of experimental solubility, correlation equations and thermodynamic property can be used as essential data for a preliminary study of industrial applications.