Triiodide on formation equilibrium and activity coefficients in aqueous solution

Journal Article · Sun Jan 01 04:00:00 EST 1984 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00650374· OSTI ID:7032033

Palmer, D A; Ramette, R W; Mesmer, R E

The equilibrium quotient for the formation of triiodide was studied as a function of temperature, 3.8-209.0/sup 0/C, and ionic strength, 0.02-6.61. The best-fit value for the molal equilibrium constant at 25/sup 0/C is 698 +/- 10 and the corresponding partial molal enthalpy, entropy, and heat capacity of formation are: ..delta..H/sup 0/ = -17.0 +/- 0.6 kJ-mol/sup -1/, ..delta..S/sup 0/ = -0.6 +/- 0,3 J-K/sup -1/-mol/sup -1/, and ..delta..D/sub p//sup 0/ = -21 +/- 8 J-K/sup -1/-mol/sup -1/. Activity coefficients of iodine were determined as a function of ionic strength (NaClO/sub 4/) at 25/sup 0/C and conclusions are drawn as to the corresponding ionic strength dependence of the triiodide anion.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 7032033
• Journal Information: J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 13:9; ISSN JSLCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
DATA
ENTHALPY
ENTROPY
EQUILIBRIUM
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
INFORMATION
IODIDES
IODINE COMPOUNDS
IONIC POTENTIAL
MEDIUM TEMPERATURE
NUMERICAL DATA
PH VALUE
PHYSICAL PROPERTIES
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THERMODYNAMICS