Thermodynamic properties of chloropinnoite |
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| Institution: | 1. Department of Biotechnology, TU Delft, Julianalaan 67, 2628 BC, Delft, The Netherlands;2. Synthon Biopharmaceuticals B.V., Microweg 22, 6503 GN, Nijmegen, The Netherlands;3. DSM Biotechnology Center, Alexander Fleminglaan 1, 2613 AX, Delft, The Netherlands;1. SABIC, 1600 Industrial Blvd., Sugar Land, TX 77478, USA;2. SABIC, Urmonderbaan 22, Geleen 6160 AH Geleen, The Netherlands;1. Lilly Centro de Investigación, Avda. de la Industria, 30, 28108 Alcobendas, Madrid, Spain;2. Lexicon Pharmaceuticals, 350 Carter Road, Princeton, NJ 08540 USA |
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| Abstract: | The molar enthalpies of solution of 2MgO · 2B2O3 · MgCl2 · 14H2O in approximately 1 mol · dm−3 aqueous hydrochloric acid (HCl) and of MgCl2 · 6H2O(s) in aqueous (approximately 1 mol · dm−3 HCl + MgCl2 + H3BO3) at T=298.15 K were determined. From a combination of these results with measured enthalpies of solution of boric acid (H3BO3) in HCl(aq) and of magnesium oxide (MgO) in aqueous (HCl + H3BO3) solution, together with the standard molar enthalpies of formation of MgO(s), H3BO3(s), MgCl2 · 6H2O(s) and H2O(l), the standard molar enthalpy of formation of −(8812 ± 3) kJ · mol−1 of 2MgO · 2B2O3 · MgCl2 · 14H2O was obtained. Thermodynamic properties of this compound were also calculated by group contribution method. |
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