Thermodynamic properties of synthetic otavite, CdCO{sub 3}(cr): Enthalpy increment measurements from 4.5 K to 350 K
- National Inst. of Standards and Technology, Gaithersburg, MD (United States)
The environmental fate of pollutants is controlled by both thermodynamic and kinetic properties. Despite the growing ability to mathematically and computationally process large simulations of soil and ground water chemistry, the quality of the simulations can be seriously compromised by poor quality thermodynamic and kinetic information. Enthalpy increments for cadmium carbonate were measured for temperatures from 4.5 K to 350 K with an adiabatic calorimeter. These measurements were used to compute the entropy, enthalpy relative to 0 K, and the heat capacity of cadmium carbonate. A small anomaly was observed for the sample in the temperature region from approximately 175 K to 265 K. Comparison of the calculated entropy for 298.15 K, 103.88 J/K{center_dot}mol, is made with other previously published reference values to arrive at a more precise and consistent set of thermodynamic properties for otavite.
- OSTI ID:
- 367834
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 41, Issue 4; Other Information: PBD: Jul-Aug 1996
- Country of Publication:
- United States
- Language:
- English
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