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

ABSTRACT

Benzenesulfonamide (BSA) is known as an important chemical material and intermediate in chemical industry. Information concerning solid-liquid equilibrium of BSA in different solvents is essential for the development of its separation and reaction process. In this work, the equilibrium solubility of BSA in 16 neat solvents, namely methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, n-pentanol, isopentanol, acetone, ethyl acetate, acetonitrile, cyclohexanone, cyclopentanone, methyl acetate, ethyl formate and dichloromethane was determined by a static gravimetric method within the temperature range of 273.15 K to 324.45 K under atmospheric pressure. The solubility of BSA increases with the rising temperature in all selected solvents. The obtained solubility was mathematically represented by using the Apelblat model, h equation, nonrandom two-liquid (NRTL) equation and the Wilson equation in order to correlate the experimental data with the adjustable parameters. The dissolution properties of BSA, including Gibbs energy (disG), molar enthalpy (disH) and molar entropy (disS) were determined according to the Wilson model and the solubility data. Positive values of the dissolution enthalpy and entropy illustrated that the dissolution processe of BSA in these solvents are endothermic and entropy-driven.