Authors: H GmatiBen Khaled I Khattech M Jemal
Publish Date: 2014/08/24
Volume: 118, Issue: 1, Pages: 579-583
Abstract
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 Xray diffraction Rb4P2O7 was involved in an hypothetical reaction and dissolved together with the other components in a 385 m/m phosphoric acid solution using a C80 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 −31837 kJ mol−1 The result is about 18 lower than literature value
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