Acidic Dissociation Constant and Related Thermodynamic Quantities for Diethanolammonium Ion in Water From 0 to 50 °C
Publication details: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology, 1962.Subject(s): Genre/Form: Online resources: Summary: The dissociation constants of diethanolamine (2:2'-dihydroxydiethylamine) and its conjugate acid were determined by electromotive force measurements of the cell [Formula: see text] in the temperature range 0 to 50 °C. The acidic dissociation constant (K(bh)) of the diethanolammonium ion is given by [Formula: see text] where T, the temperature on the Kelvin scale, lies between 273.15 and 323.15°. From this equation were calculated ΔG°, the change in free energy; ΔH°, the change in heat content; ΔS° the change in entropy; and [Formula: see text] , the change in heat capacity that accompany the dissociation of 1 mole of diethanolammonium ion in the standard state. At 25 °C, −log K(bh)= 8.883; ΔG°=50,682 joule mole(−1); ΔH°=42,400 joule mole(−1); ΔS°=−27.8 joule deg(−1)mole(−1); and [Formula: see text] joule deg(−1)mole(−1)./pmc/articles/PMC5327745/
The dissociation constants of diethanolamine (2:2'-dihydroxydiethylamine) and its conjugate acid were determined by electromotive force measurements of the cell [Formula: see text] in the temperature range 0 to 50 °C. The acidic dissociation constant (K(bh)) of the diethanolammonium ion is given by [Formula: see text] where T, the temperature on the Kelvin scale, lies between 273.15 and 323.15°. From this equation were calculated ΔG°, the change in free energy; ΔH°, the change in heat content; ΔS° the change in entropy; and [Formula: see text] , the change in heat capacity that accompany the dissociation of 1 mole of diethanolammonium ion in the standard state. At 25 °C, −log K(bh)= 8.883; ΔG°=50,682 joule mole(−1); ΔH°=42,400 joule mole(−1); ΔS°=−27.8 joule deg(−1)mole(−1); and [Formula: see text] joule deg(−1)mole(−1).
https://creativecommons.org/publicdomain/zero/1.0/
The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
en
There are no comments on this title.