Abstract
The enthalpy of solution of CsI(s) in water has been measured at various concentrations. From the results, and using auxiliary data, the enthalpy of formation of CsI was found to be −Δ H 0 f (298.15 K)= −(348.14 ± 0.18) kJ mol −1. In addition, enthalpy increments of CsI(s) have been measured by drop calorimetry from 298 to 850.7 K. The melting temperature and the enthalpy of melting have been measured by DSC measurements; the values 630.5 ± 0.2°C, and Δ H 0 m = (24.0±0.2) kJ mol −1, respectively, have been obtained. From the results obtained, and from a selection of literature data, the thermodynamic functions of CsI(s) have been calculated in the temperature range 298–903.7 K.
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