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题名: Calorimetric investigation of excess molar heat capacities for water plus ethylene glycol from T=273.15 to T=373.15 K
作者: Nan, ZD;  Liu, BP;  Tan, ZC
关键词: an adiabatic calorimeter ;  excess heat capacity ;  binary system ;  ethylene glycol ;  aqueous solution
刊名: JOURNAL OF CHEMICAL THERMODYNAMICS
发表日期: 2002-06-01
DOI: 10.1006/jcht.2002.0945
卷: 34, 期:6, 页:915-926
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 molar excess heat capacity C-p(E),m of (1-x)H2O + xHOCH(2)CH(2)OH has been measured in the temperature range from 273.15 K to 373.15 K at 5 K intervals. The C-p(,m)E values are negative and positive at all compositions between temperatures of (273.15, 283.15, 333.15 and 373.15) K, respectively. Between T = 288.15 K and T = 328.15 K, C-p(E) in values are positive for the mixtures rich in water and negative for the mixtures rich in ethylene glycol with maxima at values of x about 0.07, 0.3 and with minima at values of x about 0.6. The curve of C-p(,m)E against x at T = 303.15 K is unusual in showing three maximum values at values of x at about 0.07, 0.3, and 0.4, respectively. The curves of C-p(,m)E against T show that the effects of T on C-p(,m)E at x 0.5372, and 0.7232 are more complex. The shapes of the curves of C-p(,m)E against x and their changes with temperature can be accounted for by the structure of the binary system. (C) 2002 Elsevier Science Ltd. All rights reserved.
关键词[WOS]: MIXTURES ;  1,2-PROPANEDIOL ;  1,2-BUTANEDIOL ;  ENTHALPIES ;  ETHANEDIOL ;  ETHANOL
语种: 英语
WOS记录号: WOS:000178137300014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139185
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, Qufu 273165, Peoples R China
3.Changde Normal Coll, Dept Chem, Changde 415000, Peoples R China

Recommended Citation:
Nan, ZD,Liu, BP,Tan, ZC. Calorimetric investigation of excess molar heat capacities for water plus ethylene glycol from T=273.15 to T=373.15 K[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,2002,34(6):915-926.
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