Standard Molar Enthalpy of Formation of Hydrated Sodium Cupric Arsenate [NaCuAsO4×1.5H2O(s)]

• Autorzy: Di Y. Y. , Chen J. T. , Tan Z. C.
• Języki publikacji: EN

Abstrakty

EN

A new compound (NaCuAsO4×1.5H2O) was synthesized, and its composition was determined by means of the methods of ignition loss-in-weight and chemical analysis. The standard molar enthalpies of dissolution of the mixtures {Na3AsO4×12H2O(s) + CuSO4×5H2O(s)} and {NaCuAsO4×1.5H2O(s) + Na2SO4(s)} in 1.498 mol×dm–3 HCl so lu - tion at 298.15 K have been determined to be respectively Ds m. H 1 0 = (64322 š 63) J×mol–1 and Ds m. H 2 0 = –(20558 š 25) J×mol–1 using an isoperibol solution-reaction calorimetry. From these values and other thermodynamic data, the standard molar enthalpy of formation of NaCuAsO4×1.5H2O(s) has been de rived: Df m H0 (NaCuAsO4×1.5H2O, s, 298.15 K) = –(1469.33 š 0.65) kJ×mol –1. In addition, UV/Vis spectra and refractive in dexes of solution A and solution A’ were measured to examine the reliability of the designed thermodynamic cycle.

Słowa kluczowe

EN

NaCuAsO4×1.5H2O(s); isoperibol solution-reaction calorimetry; standard molar enthalpy of formation; UV-Vis spectroscopy

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2007
• Tom: Vol. 81, nr 9
• Strony: 1535--1540
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Di Y. Y.

autor

Chen J. T.

autor

Tan Z. C.

• College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, Shandong, China,

Bibliografia

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• 3. Di Y.Y, Tan Z.C. And Li Y.-S., Acta Chim. Sinica, 64, 2414 (2006) (in Chinese).
• 4. Rychly R. And Pekarek V., J Chem. Thermodyn., 9, 391 (1977).
• 5. Wagman D.D., Wagman D.D., The NBS Table of Chemical Thermodynamic Properties, J. Phys. Chem. Ref. Data, 11,Suppl. 2, (1982).
• 6. Report of the COD ATA Task Group on key values for thermodynamics, J. Chem. Thermodyn., 10,903 (1978).