Thermochemistry of hydrated calcium borates

被引:43
作者
Li, J [1 ]
Gao, SY [1 ]
Xia, SP [1 ]
Li, B [1 ]
Hu, RZ [1 ]
机构
[1] XIAN MODERN CHEM RES INST,XIAN,PEOPLES R CHINA
关键词
standard molar enthalpy of formation; hydrated calcium borates; solution calorimetry; molar enthalpy of solution; aqueous hydrochloric acid solution;
D O I
10.1006/jcht.1997.0224
中图分类号
O414.1 [热力学];
学科分类号
摘要
The enthalpies of solution of five hydrated calcium berates in approximately 1 mol.dm(-3) aqueous hydrochloric acid were determined. From a combination of these results with measured enthalpies of solution of H3BO3 in HCl(aq) and of CaO in (hydrochloric acid + boric acid) (ag), together with the standard molar enthalpies of formation of CaO(s), H3BO3(s), and H2O(1), the standard molar enthalpies of formation of the five hydrated calcium berates were obtained. (C) 1997 Academic Press Limited.
引用
收藏
页码:1071 / 1075
页数:5
相关论文
共 10 条
  • [1] Cox J.D., 1989, CODATA KEY VALUES TH
  • [2] GODE G, 1986, ALKALINE EARTH METAL
  • [3] GUREVICH VM, 1976, GEOKHIMIYA, V3, P455
  • [4] HELLER G, 1986, TOP CURR CHEM, V131, P39
  • [5] KESAN A, 1962, SYNTHESIS BORATES AQ
  • [6] LI J, 1995, SPECTROCHIM ACTA A, V51, P519, DOI 10.1016/0584-8539(94)00183-C
  • [7] Thermochemistry of hydrated magnesium borates
    Li, J
    Gao, SY
    Xia, SP
    Li, B
    Hu, RZ
    [J]. JOURNAL OF CHEMICAL THERMODYNAMICS, 1997, 29 (04) : 491 - 497
  • [8] LI J, 1994, THESIS LANZHOU U
  • [9] PARKER VB, 1965, NATL STAND REF DAT S
  • [10] HEATS OF FORMATION OF 3CAO.B2O3, 2CAO.B2O3, CAO.B2O3 AND CAO.2B2O3
    TORGESON, DR
    SHOMATE, CH
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1947, 69 (09) : 2103 - 2105