Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9633623 | The Journal of Chemical Thermodynamics | 2005 | 13 Pages |
Abstract
The chemical reaction equilibrium constant for the formation of pyrosulfite from bisulfite in aqueous solutions {2HSO3-(aq)âS2O52-(aq)+H2O(l)} was determined for temperatures from (313 to 353) K from ATR-IR-spectroscopic and calorimetric investigations of the system (Na2S2O5 + H2O), resulting in ln K = â10.226 + 2123.6/(T/K), ÎrGmâ=(7.69±0.33)kJ·mol-1,ÎrHmâ=(-17.7±0.5)kJ·mol-1 (on the molality scale). Furthermore, some ATR-IR-spectroscopic results on liquid mixtures of (NH3 + SO2 + H2O) at T = 313 K are presented, revealing considerable amounts of pyrosulfite.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Viktor Ermatchkov, Álvaro Pérez-Salado Kamps, Gerd Maurer,