1. The standard enthalpy of formation of 1,2,3,4-tetrachlorodibenzo-p-dioxine
- Author
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V.A. Lukyanova, N. V. Chelovskaya, V.P. Kolesov, V. P. Vorob'eva, Piotr I. Dem'yanov, A. N. Fedotov, T. S. Papina, and N. V. Avramenko
- Subjects
chemistry ,Enthalpy of sublimation ,chemistry.chemical_element ,Physical chemistry ,Heat of combustion ,Physical and Theoretical Chemistry ,Standard enthalpy change of formation ,Combustion ,Platinum ,Standard enthalpy of formation ,Calorimeter - Abstract
The energy of combustion of crystalline 1,2,3,4-tetrachlorodibenzo-p-dioxine (-5122.9 ± 7.4 kJ/mol) was measured using an isothermic-shell calorimeter with a rotating platinum plated bomb. The result was used to calculate the enthalpy of combustion (-5120.4 ± 7.4 kJ/mol) and formation (−267.8 ± 7.6 kJ/mol) for the crystalline state. The enthalpy of sublimation was measured using a Calvet microcalorimeter at 411.5 K (116.0 ± 2.6 kJ/mol); recalculation to T = 298.15 K gave 118.7 ± 2.6 kJ/mol. The enthalpy of formation of 1,2,3,4-tetrachlorodibenzo-p-dioxine in the gas state was calculated (−149.1 ± 8.0 kJ/mol)
- Published
- 2007
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