盐卤硼酸盐化学 ⅩⅤ.2MgO·B_2O_3.MgCl_2·14H_2O和MgO.2B_2O_3·9H_2O的热化学研究  

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

作　　者：李军[1] 高世扬[1] 屈景年[2] 屈松生[3] 

机构地区：[1]中国科学院盐湖研究所,西宁810008 [2]湖南衡阳师范专科学校 [3]武汉大学化学系

出　　处：《应用化学》1993年第3期12-15,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金;中国科学院基础研究资助课题

摘　　要：合成氯柱硼镁石(2MgO·2B_2O_3·MgCl_2·14H_2O)和章氏硼镁石(MgO·2B_2O_3·9H_2O),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。The enthalpies of solution of two Mg-borates(2MgO·2B_2O_3·MgCl_2·14H_2O and MgO·2B_2O_3·9H_2O) in 0. 997mol/L HCl 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—5807.07k J/mol separately. The standard molar entropy of MgO·2B_2O_3·9H_2O was also given.

关 键 词：镁硼酸盐 溶解热 标准生成焓 

分 类 号：O613.81[理学—无机化学]