Synthesis and enthalpy of formation of SrB4O7•3H2O

被引：0
|
作者：
Gao, Yi-Hong [1 ]
Huang, Hong-Sheng [1 ]
Liu, Zhi-Hong [1 ]
机构：
[1] Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Sch Chem & Mat Sci, Xian 710062, Peoples R China
来源：
THERMOCHIMICA ACTA | 2008年 / 470卷 / 1-2期
关键词：
strontium borates; standard molar enthalpy of formation; solution calorimetry;
D O I：
10.1016/j.tca.2008.02.014
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Hydrated strontium borate, SrB4O7 center dot 3H(2)O, has been synthesized and characterized by XRD, FT IR, DTA-TG and chemical analysis. The molar enthalpy of solution of SrB4O7 center dot 3H(2)O in 1 mol dm(-3) HCl(aq) was measured to be (21.15 +/- 0.29) kJ mol(-1). With incorporation of the previously determined enthalpies of solution of Sr(OH)(2)center dot 8H(2)O(s) in [HCl(aq) +H3BO3(aq)] and H3BO3 in HCl(aq), and the enthalpies of formation of 1420(1), Sr(OH)(2)-8H(2)O(s) and H3BO3(s), the enthalpy of formation of SrB(4)O7 center dot H2O was found to be -(4286.7 +/- 3.3) kJ mol(-1). (c) 2008 Elsevier B.V All rights reserved.
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页码：113 / 114
页数：2
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