Physical Inorganic Chemistry
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ChemInform Abstract: Note on the Enthalpies of Formation of SrWO4 and BaWO4 Determined by High-Temperature Direct Synthesis Calorimetry from SrCO3 + WO3 and BaCO3 + WO3.
First published: 23 June 2010
Abstract
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ChemInform Abstract
A comparison, based on CaO and CaCO3, (instability of SrO, BaO in air) between the measured values of the enthalpy changes of the reactions CaO(s, 298 K) + WO3(s, 298 K) = CaWO4(s, 1473 K) and CaCO3(s, 298 K) + WO3(s, 298 K) = CaWO4(s, 1473 K) + CO2(g,1473 K) is given. Enthalpy change values, ΔH = 13.97 and 9.34 kJ/mol, resp., are similar when the reaction with CaCO3 is carried out in the presence of alumina spheres.
