Redetermination of low-temperature heat capacity of Cu(C5H7O2)2
| Autor: | M.A. Bespyatov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Phase transition
Enthalpy chemistry.chemical_element Thermodynamics 02 engineering and technology Calorimetry Atmospheric temperature range 010402 general chemistry 01 natural sciences Copper Heat capacity Atomic and Molecular Physics and Optics 0104 chemical sciences Gibbs free energy symbols.namesake 020401 chemical engineering chemistry symbols General Materials Science 0204 chemical engineering Physical and Theoretical Chemistry Debye model |
| Zdroj: | The Journal of Chemical Thermodynamics. 137:1-6 |
| ISSN: | 0021-9614 |
| DOI: | 10.1016/j.jct.2019.05.010 |
| Popis: | The heat capacity of copper bis-acetylacetonate (Cu(C5H7O2)2) was measured over the temperature range (6.54–313.16) K by adiabatic-shield calorimetry. No anomalies associated with phase transition were found in the functional heat capacity behaviour. The Debye temperature at 0 K was calculated. The data obtained were used to calculate its thermodynamic functions (entropy, enthalpy, reduced Gibbs energy) in the range (0–313) K. They have the following values at 298.15 K: Cp° = (283.9 ± 0.5) J K−1 mol−1, Δ0298.15Sm° = (359.1 ± 0.8) J K−1 mol−1, Δ0298.15Hm° = (50.94 ± 0.09) kJ mol−1, Φm° = (188.3 ± 1.1) J K−1 mol−1. The value of the absolute entropy were used to calculate the entropy of formation of Cu(C5H7O2)2 (cr) at T = 298.15 K. The universal heat capacity behaviour of metal acetylacetonates was demonstrated in a wide temperature range. |
| Databáze: | OpenAIRE |
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