Standard molar enthalpy of formation of rubidium diphosphate
| Autor: | Ismail Khattech, Mohamed Jemal, H. Gmati-Ben Khaled |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Standard enthalpy of reaction
Inorganic chemistry Enthalpy chemistry.chemical_element Condensed Matter Physics Ammonium dihydrogen phosphate Standard enthalpy of formation Rubidium Enthalpy change of solution chemistry.chemical_compound Enthalpy of atomization chemistry Rubidium carbonate Physical and Theoretical Chemistry |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 118:579-583 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-014-4023-9 |
| Popis: | Rubidium carbonate (Rb2CO3) and ammonium dihydrogen phosphate (NH4H2PO4) were used for synthesizing rubidium diphosphate (Rb4P2O7). The purity of the latter compound was checked up by X-ray diffraction. Rb4P2O7 was involved in an hypothetical reaction and dissolved together with the other components in a 3.85 % (m/m) phosphoric acid solution, using a C-80 SETARAM calorimeter. Mixing processes were also realized in the calorimeter in order to get the standard molar enthalpy of formation of rubidium diphosphate (Rb4P2O7). For that a thermochemical cycle was investigated and the obtained value for the standard molar enthalpy of formation of rubidium diphosphate is (−3,183.7) kJ mol−1. The result is about 1.8 % lower than literature value. |
| Databáze: | OpenAIRE |
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