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题名: Thermodynamic investigation of several natural polyols (II) - Heat capacities and thermodynamic properties of sorbitol
作者: Tong, B.1, 3;  Tan, Z. C.1, 2;  Shi, Q.1, 3;  Li, Y. S.2;  Wang, S. X.2
通讯作者: 谭志诚
关键词: DSC ;  heat capacity ;  phase transition ;  sorbitol ;  TG-DTG ;  thermodynamic properties
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2008-02-01
DOI: 10.1007/s10973-007-8361-8
卷: 91, 期:2, 页:463-469
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, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The low-temperature heat capacity C-p,C-m of sorbitol was precisely measured in the temperature range from 80 to 390 K by means of a small sample automated adiabatic calorimeter. A solid-liquid phase transition was found at T=369.157 K from the experimental C-p-T curve. The dependence of heat capacity on the temperature was fitted to the following polynomial equations with least square method. In the temperature range of 80 to 355 K, C-p,C-m/J K-1 mol(-1)=170.17+157.75x+128.03x(2)-146.44x(3)-335.66x(4)+177.71x(5)306.15x(6), x= [(T/K)-217.5]/137.5. In the temperature range of 375 to 390 K, C-p,C-m/J K-1 mol(-1)=518.13+3.2819x, x=[(T/K)-382.5]/7.5. The molar enthalpy and entropy of this transition were determined to be 30.35 +/- 0.15 kJ mol(-1) and 82.22 +/- 0.41 J K-1 mol(-1) respectively. The thermodynamic functions [H-T-H-298.15] and [S-T-S-298.15], were derived from the heat capacity data in the temperature range of 80 to 390 K with an interval of 5 K. DSC and TG measurements were performed to study the thermostability of the compound. The results were in agreement with those obtained from heat capacity measurements.
关键词[WOS]: PHASE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000252994700020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100393
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.Dalian Univ Technol, Coll Environm Sci & Engn, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Tong, B.,Tan, Z. C.,Shi, Q.,et al. Thermodynamic investigation of several natural polyols (II) - Heat capacities and thermodynamic properties of sorbitol[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2008,91(2):463-469.
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