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Titolo:
THERMOCHEMISTRY OF ULEXITE
Autore:
CHEN RY; LI J; XIA SP; GAO SY;
Indirizzi:
LANZHOU UNIV,DEPT CHEM LANZHOU 730000 PEOPLES R CHINA LANZHOU UNIV,DEPT CHEM LANZHOU 730000 PEOPLES R CHINA CHINESE ACAD SCI,INST SALT LAKES,XIAN BRANCH XIAN 710043 SHAANXI PROVPEOPLES R CHINA
Titolo Testata:
Thermochimica acta
fascicolo: 1-2, volume: 306, anno: 1997,
pagine: 1 - 5
SICI:
0040-6031(1997)306:1-2<1:>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Keywords:
MOLAR ENTHALPY OF SOLUTION; SOLUTION CALORIMETRY; STANDARD MOLAR ENTHALPY OF FORMATION; ULEXITE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
R.Y. Chen et al., "THERMOCHEMISTRY OF ULEXITE", Thermochimica acta, 306(1-2), 1997, pp. 1-5

Abstract

The enthalpy of solution of ulexite NaCa[B5O6(OH)(6)]5 . H2O in approximate to 1 mol dm(-3) aqueous hydrochloric acid has been measured. From this result and the enthalpies of solution of H(3)BO(0)3 in HCl(aq), of CaO in aqueous (hydrochloric acid + boric acid), and of NaCl in aqueous (hydrochloric acid + boric acid + calcium oxide), the standard molar enthalpy of formation of ulexite of -6762.24 +/- 4.22 kJ mol(-1)has been obtained. The standard molar entropy of formation of ulexitewas calculated from the thermodynamic relation with the standard molar Gibbs free energy of formation of ulexite computed from its solubility in water. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 09:30:37