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题名: Measurements of the heat capacity of an azeotropic mixture of water and n-butanol from 78 to 320 K
作者: Nan, ZD;  Tan, ZC;  Xing, J
通讯作者: 南照东
关键词: adiabatic calorimetry ;  heat capacity ;  excess heat capacity ;  azeotropic mixture ;  water ;  n-butanol
刊名: CHINESE JOURNAL OF CHEMISTRY
发表日期: 2005-10-01
卷: 23, 期:10, 页:1297-1302
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Molar heat capacities of n-butanol and the azeotropic mixture in the binary system [water (x=0.716) plus n-butanol (x=0.284)] were measured with an adiabatic calorimeter in a temperature range from 78 to 320 K. The functions of the heat capacity with respect to thermodynamic temperature were established for the azeotropic mixture. A glass transition was observed at (111.9 +/- 1.1) K. The phase transitions took place at (179.26 +/- 0.77) and (269.69 +/- 0.14) K corresponding to the solid-liquid phase transitions of. n-butanol and water, respectively. The phase-transition enthalpy and entropy of water were calculated. A thermodynamic function of excess molar heat capacity with respect to temperature was established, which took account of physical mixing, destructions of self-association and cross-association for n-butanol and water, respectively. The thermodynamic functions and the excess thermodynamic ones of the binary systems relative to 298.15 K were derived based on the relationships of the thermodynamic functions and the function of the measured heat capacity and the calculated excess heat capacity with respect to temperature.
关键词[WOS]: THERMODYNAMIC FUNCTIONS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000232213200003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93489
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Qufu Normal Univ, Dept Chem, Shandong 273165, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Nan, ZD,Tan, ZC,Xing, J. Measurements of the heat capacity of an azeotropic mixture of water and n-butanol from 78 to 320 K[J]. CHINESE JOURNAL OF CHEMISTRY,2005,23(10):1297-1302.
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