中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Thermodynamic investigation of several natural polyols (I): Heat capacities and thermodynamic properties of xylitol
作者: Tong, Bo;  Tan, Zhi-Cheng;  Shi, Quan;  Li, Yan-Sheng;  Yue, Dan-Ting;  Wang, Shao-Xu
通讯作者: 谭志诚
关键词: xylitol ;  heat capacity ;  phase transition ;  thermodynamic properties ;  standard molar enthalpy of combustion ;  standard molar enthalpy of formation ;  adiabatic calorimetry ;  TG-DTG ;  DSC
刊名: THERMOCHIMICA ACTA
发表日期: 2007-06-15
DOI: 10.1016/j.tca.2007.02.022
卷: 457, 期:1-2, 页:20-26
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,m(0) of xylitol 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 from the experimental C-p-T curve in the temperature range 360-375 K with the peak heat capacity at 369.04 K. The dependence of heat capacity on the temperature was fitted to the following polynomial equations with least square method. In the temperature range of 80-360 K, C-p,m(0) (J K-1 mol(-1)) = 165.87 + 105.19x + 1.8011(2) - 41.445x(3) - P 41.851x(4) + 65.152x(5) + 66.744x(6), x = [T(K) - 220]/140. In the temperature range of 370-390 K, C-p,m(0) (J K-1 mol(-1)) = 426.19 + 5.6366x, x = [T(K) - 380]/10. The molar enthalpy and entropy of this transition were determined to be 33.26 +/- 0.17 kJ mol(-1) and 90.12 +/- 0.45 J K-1 mol(-1), respectively. The standard thermodynamic functions (H-T(0) - H-298.15(0)) and (S-T(0) - S-298.15(0)), were derived from the heat capacity data in the temperature range of 80 to 390 K with an interval of 5 K. The standard molar enthalpy of combustion and the standard molar enthalpy of formation of the compound have been determined, Delta H-c(m)0 (C5H12O5, cr) = (-2463.2 +/- 1.2) kJ mol(-1) and Delta H-f(m)0 (C5H12O5, cr) = (-1219.3 +/- 0.3) kJ mol(-1), by means of a precision oxygen bomb combustion calorimeter at T= 298.15 K. DSC and TG measurements were performed to study the thermal stability of the compound. The results were in agreement with those obtained from heat capacity measurements. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: ENTHALPIES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000246943200004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99729
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Tong, Bo,Tan, Zhi-Cheng,Shi, Quan,et al. Thermodynamic investigation of several natural polyols (I): Heat capacities and thermodynamic properties of xylitol[J]. THERMOCHIMICA ACTA,2007,457(1-2):20-26.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Tong, Bo]'s Articles
 [Tan, Zhi-Cheng]'s Articles
 [Shi, Quan]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Tong, Bo]‘s Articles
 [Tan, Zhi-Cheng]‘s Articles
 [Shi, Quan]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace