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Titolo:
Thermochemistry of dipotassium calcium octaborate dodecahydrate
Autore:
Jia, YZ; Li, J; Gao, SY; Xia, SP;
Indirizzi:
Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China Lanzhou Univ Lanzhou Peoples R China 730000 zhou 730000, Peoples R China Chinese Acad Sci, Inst Salt Lakes, Xian Branch, Xian 710043, Peoples R China Chinese Acad Sci Xian Peoples R China 710043 ian 710043, Peoples R China
Titolo Testata:
THERMOCHIMICA ACTA
fascicolo: 1-2, volume: 335, anno: 1999,
pagine: 1 - 4
SICI:
0040-6031(19990906)335:1-2<1:TODCOD>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Keywords:
K2O center dot CaO center dot 4B(2)O(3)center dot 12H(2)O; standard molar enthalpy of formation; solution calorimetry; molar enthalpy of solution; aqueous hydrochloric acid solution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Gao, SY Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China Lanzhou Univ Lanzhou Peoples R China 730000 000, Peoples R China
Citazione:
Y.Z. Jia et al., "Thermochemistry of dipotassium calcium octaborate dodecahydrate", THERMOC ACT, 335(1-2), 1999, pp. 1-4

Abstract

The enthalpies of solution of K2O . CaO . 4B(2)O(3). 12H(2)O in approximately 1 mol dm(-3) aqueous hydrochloric acid, and of KCl in aqueous (hydrochloric acid+boric acid+calcium oxide) were determined. Together with the previously determined enthalpies of solution of H3BO3 in approximately 1 mol dm(-3) HCl(aq), and of CaO in aqueous (hydrochloric acid+boric acid), the standard molar enthalpy of formation of -(10308.00+/-6.56) kJ mol(-1) for K2O . CaO . 4B(2)O(3). 12H(2)O was obtained from the standard molar enthalpies of formation of CaO(s), H3BO3(s), KCl(s), and H2O(l). The standard molar entropy of formation of K2O . CaO . 4B(2)O(3). 12H(2)O was calculated from the thermodynamic relation with the standard molar Gibbs free energy of formation of K2O . CaO . 4B(2)O(3). 12H(2)O computed from the group contributionmethod. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 06:06:14