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Thermodynamic quantities for the interaction of H+ and Na+ with C2H3O 2 − and Cl− in aqueous solution from 275 to 320°C
Authors:J L Oscarson  S E Gillespie  J J Christensen  R M Izatt  P R Brown
Institution:(1) Departments of Chemistry and Chemical Engineering, Brigham Young University, 84602 Provo, UT
Abstract:The aqueous reactions, {ie865-1}were studied as a function of ionic strength at 275, 300, and 320°C using a flow calorimetric technique. Log K, DeltaH and DeltaS values were determined from the fits of the calculated and experimental heats while DeltaCp values were calculated from the variation of DeltaH values with temperature. The log K and DeltaH values for the first two reactions agree well with literature values at these temperatures. No previous results have been reported for the third reaction. The use of equations containing identical numbers of positive and identical numbers of negative charges on both sides of the equal sign (isocoulombic reaction principle) was applied to the log K values determined in this study. The resulting plots of log K for the isocoulombic reactions vs. I/T were approximately linear, which demonstrates that the DeltaCp values for these reactions are approximately zero.Deceased 5 September 1987
Keywords:Equilibrium constant  enthalpy change  entropy change  heat capacity change  capacity change  flow calorimetry  high temperature  hydrochloric acid  acetic acid  sodium acetate  isocoulombic reaction
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