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题名: Low-temperature heat capacities and derived thermodynamic functions of cyclohexane
作者: Nan, ZD;  Tan, ZC
关键词: adiabatic calorimetry ;  cyclohexane ;  heat capacity ;  sample container ;  thermodynamic function
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2004
卷: 76, 期:3, 页:955-963
收录类别: SCI
文章类型: Article
项目归属: 1504
产权排名: 2;2
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The low-temperature heat capacities of cyclohexane were measured in the temperature range from 78 to 350 K by means of an automatic adiabatic calorimeter equipped with a new sample container adapted to measure heat capacities of liquids. The sample container was described in detail. The performance of this calorimetric apparatus was evaluated by heat capacity measurements on water. The deviations of experimental heat capacities from the corresponding smoothed values lie within +/-0.3%, while the inaccuracy is within +/-0.4%, compared with the reference data in the whole experimental temperature range. Two kinds of phase transitions were found at 186.065 and 279.684 K corresponding solid-solid and solid-liquid phase transitions, respectively. The entropy and enthalpy of the phase transition, as well as the thermodynamic functions {H-(T)- H-298.15 K} and {S-(T)-S-298.15 K}, were derived from the heat capacity data. The mass fraction purity of cyclohexane sample used in the present calorimetric study was determined to be 99.9965% by fraction melting approach.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000222091300027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81457
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.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Qufu Normal Univ, Dept Chem, Shandong 273165, Peoples R China

Recommended Citation:
Nan, ZD,Tan, ZC. Low-temperature heat capacities and derived thermodynamic functions of cyclohexane[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2004,76(3):955-963.
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