中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (3): 12-15.

• 研究论文 • 上一篇    下一篇

盐卤硼酸盐化学 ⅩⅤ.2MgO·2B2O3·MgCl2·14H2O和MgO·2B2O3·9H2O的热化学研究

李军1, 高世扬1, 屈景年2, 屈松生2   

  1. 1. 中国科学院盐湖研究所 810008 西宁;
    2. 武汉大学化学系 武汉
  • 收稿日期:1992-06-16 修回日期:1992-09-14 出版日期:1993-06-10 发布日期:1993-06-10
  • 基金资助:
    国家自然科学基金;中国科学院基础研究资助课题

CHEMISTRY OF BORATE IN SALT LAKE BRINE ⅩⅤ.THERMOCHEMICAL STUDY OF Mg-BORATES

Li Jun1, Gao Shiyang1, Qu Jingnian2, Qu Songsheng2   

  1. 1. Institute of Salt Lakes, Chinese Academy of Sciences, 810008 Xining;
    2. Department of Chemistry, Wuhan University, Wuhan
  • Received:1992-06-16 Revised:1992-09-14 Published:1993-06-10 Online:1993-06-10

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摘要： 合成氯柱硼镁石(2MgO·2B2O3·MgCl2·14H2O)和章氏硼镁石(MgO·2B2O3·9H2O),用恒定温度环境反应热量计测定溶解热和反应热的基础上,运用热化学循环原理计算得到这两种硼酸盐的标准生成焓。

关键词: 镁硼酸盐, 溶解热, 标准生成焓

Abstract: The enthalpies of solution of two Mg-borates(2MgO·2B2O3·MgCl2·14H2O and MgO·2B2O3·9H2O) in 0.997mol/LHCl solution were measured by using isoperibel reaction colorimeter.The standard enthalpies of formation of the two Mg-borate salts were obtained according to thermochemistry theory. The values are-8638.42kJ/tool and-5807.07kJ/mol separately. The standard molar entropy of MgO·2B2O3·9H2O was also given.

Key words: Mg-borate, enthalpy of solution, standard enthalpy of formation

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