Article ID Journal Published Year Pages File Type
9633623 The Journal of Chemical Thermodynamics 2005 13 Pages PDF
Abstract
The chemical reaction equilibrium constant for the formation of pyrosulfite from bisulfite in aqueous solutions {2HSO3-(aq)⇌S2O52-(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 = −10.226 + 2123.6/(T/K), ΔrGm∘=(7.69±0.33)kJ·mol-1,ΔrHm∘=(-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.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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