Acidic Dissociation Constant and Related Thermodynamic Quantities for Diethanolammonium Ion in Water From 0 to 50 °C
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Name of publisher, distributor, etc.
[Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology,
Date of publication, distribution, etc.
1962.
500 ## - GENERAL NOTE
General note
/pmc/articles/PMC5327745/
520 ## - SUMMARY, ETC.
Summary, etc.
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).
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
Terms governing use and reproduction
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
Terms governing use and reproduction
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.
546 ## - LANGUAGE NOTE
Language note
en
690 ## - LOCAL SUBJECT ADDED ENTRY--TOPICAL TERM (OCLC, RLIN)
