Thermochemistry ofDipotassium Magnesium Dodecaborate Decahydrate

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• 出版年：2001
• 作者：CAI Shu-guang；LI Jun；LI Bing
• 单位1：Xian Branch，Qinghaz Institute of Salt Lakes。The Chinese Academy of Sciences
• 出生年：1971
• 学历：硕士研究生
• 语种：英文
• 作者关键词：Dipotassium magnesium dodecaborate decahydrate ；Standard molar enthalpy of form ation；Solution calorimetry；Molar enthalpy of solutio n；Aqueous hydrochloric acid solution
• 起始页：41
• 总页数：7
• 刊名：盐湖研究
• 是否内版：否
• 刊频：季刊
• 创刊时间：1992
• 主办单位：中国科学院青海盐湖研究所
• 主编：高世扬
• 地址：北京东黄子薄城根北街36号
• 邮编：100717
• 卷：9
• 期：4
• 期刊索取号：P\224.06\998
• 数据库收录：中国科学引文数据库收录期刊
• 核心期刊：中文核心期刊

摘要

The enthalpies of solution of K₂O·MgO·6B₂0₃·10H₂O in approx imately lmol·dn'l^-3 aqueous hydrochloric acid．and of KCI inaqueous (hydrochloric acid+boric acid+magnesium oxide)were determined．Together with the previously determined enthal-pies of solu tion of H₃BO₃ in approximately 1 mol·dm^-3 HCI(aq) ，and of MgO in aqueous(hydrochloric acid+boric acid ) ，the standardmolar enth alpy of formation of-(12250.35 ±9.68)kJ·mol～for K₂0·MgO·6B ₂0₃·lOH₂0 was obtained from the standard molar enthalpies of formation ofMgO(s)，H₂80₃(s)，KCI(s)，and H₂o (1)．The standard molar entropy of forma tion of-3848.23J·K^-1·mol^-1and standard molar entropy of 765.9 6J·K^-1·NOl^-1for K²o·MgO·6B₂O₃·1OH₂0 were calculated from the thermodynamic relations．