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Updated: Oct 10, 2025

Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures
Published on: November 7, 2016
Enthalpies of Solution of KBr, KI, KIO3, and KIO4 in H2O
M E Efimov1, G N Klevaichuk1, V A Medvedev1
1Institute of High Temperatures, Academy of Sciences, Moscow, USSR.
Abstract:
Enthalpy of solution measurements of four potassium salts in H2O were made in either an adiabatic or an isoperibol calorimeter or both. The following summarizes the measured and recommended values: [Table: see text] The value for KIO4 has been corrected for the hydrolysis of the periodate ion. The ΔC = -(82.5 ± 4.3)J·mol-1·K-1 for the unhydrolysed reaction. For the reaction of KBr in H2O, ΔC was measured as -(166.6 ± 7.2) J·mol-1·K-1 in the temperature range 298 K to 319 K. Measurements with the isoperibol calorimeter are also reported for the endothermic reaction of tris(hydroxymethyl)aminomethane, SRM 724a, in aqueous NaOH (0.05 mol·L-1). Comparisons of measurements by different calorimeters on the same samples reveal unidentified calorimetric errors for endothermic reactions which are greater than the imprecision of the measurements.
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