Table of Contents
Journal of Thermodynamics
Volume 2011, Article ID 432132, 4 pages
Research Article

Vapor Pressure of Saturated Aqueous Solutions of Potassium Sulfate from 310 K to 345 K

Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE), Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina

Received 29 June 2011; Accepted 11 September 2011

Academic Editor: Angelo Lucia

Copyright © 2011 Matias O. Maggiolo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The experimental evaluation of the vapor pressure of saturated aqueous solutions of potassium sulfate was carried out in the range of temperatures 3 1 0 K 𝑇 3 4 5 K . The experimental data were used to determine the corresponding values of the water activity in such solutions. The analytical expressions as a function of temperature of both, vapor pressure and water activity, were obtained from the correlation of the experimental results. The vapor pressure expression was also extrapolated to a different temperature range in order to make a comparison with the results obtained by other authors.