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Enthalpy of solution of potassium tetrafluoroborate in water and in aqueous sodium fluoride. Thermodynamic properties of the aqueous tetrafluouroborate anion and potassium tetrafluroborate

Published

Author(s)

Donald G. Archer

Abstract

An adiabatic calorimeter was used to measure the enthalpy of solution of potassium tetrafluoroborate (0.01mol.kg-1 to 0.02 mol.kg-1) into water and into aqueous sodium fluoride of different ionic strengths (0.2 mol.kg-1 and 0.5 mol.kg-1) at 298 K and 313 K. The present results yield the standard-state enthalpy and heat capacity for the solution process, and, when combined with literature values for solubilities, yield the standard-state entropy of the solution process. From these properties, and previous measurements involving potassium tetrafluoroborate, we provide new analysis of thermodynamic properties of the aqueous tetrafluoroborate ion and compare these new properties to previous tabulations and explain the sources of discrepancies in the literature.
Citation
Journal of Chemical and Engineering Data
Volume
50
Issue
2

Keywords

aqueous, enthalpy, entropy, Gibbs energy, heat capacity, solubility, solution, tetreafluoroborate, thermodynamic

Citation

Archer, D. (2005), Enthalpy of solution of potassium tetrafluoroborate in water and in aqueous sodium fluoride. Thermodynamic properties of the aqueous tetrafluouroborate anion and potassium tetrafluroborate, Journal of Chemical and Engineering Data, [online], https://doi.org/10.1021/je049599z (Accessed June 25, 2024)

Issues

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Created February 4, 2005, Updated January 27, 2020