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题名: Low-temperature heat capacities and phase transitions of the ternary system of (0.195 ethandiol+0.132 ethanol+0.673 water)
作者: Song, YJ;  Tan, ZC;  Meng, SH;  Zhang, JB
关键词: heat capacity ;  phase transition ;  thermal conductivity ;  ethylene glycol ;  ethyl alcohol ;  aqueous solution
刊名: JOURNAL OF CHEMICAL THERMODYNAMICS
发表日期: 1999-10-01
卷: 31, 期:10, 页:1359-1368
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Thermodynamics ;  Chemistry, Physical
研究领域[WOS]: Thermodynamics ;  Chemistry
英文摘要: The heat capacities of the ternary system of 0.195 mole fraction of ethandiol (ethylene glycol), 0.132 mole fraction of ethanol (ethyl alcohol), and 0.673 mole fraction of water (Le. 0.40, 0.20, and 0.40 mass fraction, respectively) have been measured with an adiabatic calorimeter in the temperature range T = 80 K to T = 350 K. This mixture exhibits complex phase transitions in the solid state. A very broad heat capacity anomaly from T = 130 K to T = 240 K was observed in the heat capacity curve, and three heat capacity peaks were found at T = (149, 170, 186) K, in addition to the melting peak at T = 217.5 K. The corresponding phase transition and fusion enthalpies were determined to be (228+/-10) J . mol(-1), (230+/-8) J . mol(-1), (136+/-8) J . mol(-1), and (260+/-10) J . mol(-1) respectively. Experiments have demonstrated that the cooling rate between 0.1 K . min(-1) and 10 K min-l had no obvious influence on the heat capacity anomaly. The thermal conductivity of this ternary system was measured with an instantaneous heating wire conductometer in the temperature range from T = 233.15 K to T = 343.15 K. All of the heat capacity and thermal conductivity results in the temperature range between T = 221 K and T = 350 K were correlated with temperatures for practical applications. (C) 1999 Academic Press.
关键词[WOS]: GLASSY STATE
语种: 英语
WOS记录号: WOS:000082878800012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138551
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

Recommended Citation:
Song, YJ,Tan, ZC,Meng, SH,et al. Low-temperature heat capacities and phase transitions of the ternary system of (0.195 ethandiol+0.132 ethanol+0.673 water)[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,1999,31(10):1359-1368.
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