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题名: Low-temperature heat-capacity and standard molar enthalpy of formation of copper L-threonate hydrate Cu(C4H6O5)center dot 0.5H(2)O(s)
作者: Qing, W;  Chen, SP;  Gao, SL;  Tan, ZC;  Di, YY;  Shi, QZ
通讯作者: Di YY
关键词: Cu(C4H6O5)center dot 0.5H(2)O(s) ;  low-temperature heat-capacity ;  adiabatic calorimetry ;  rotating-bomb combustion calorimetry ;  standard molar enthalpy of formation
刊名: THERMOCHIMICA ACTA
发表日期: 2006-02-15
DOI: 10.1016/j.tca.2005.12.008
卷: 441, 期:2, 页:132-136
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 2;4
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 solid copper L-threonate hydrate, Cu(C4H6O5)center dot 0.5H(2)O, was synthesized by the reaction of L-threonic acid with copper dihydrocarbonate and characterized by means of chemical and elemental analyses, IR and TG-DTG. Low-temperature heat-capacity of the title compound has been precisely measured with a small sample precise automated adiabatic calorimeter over the temperature range from 77 to 390 K. An obvious process of the dehydration occurred in the temperature range between 353 and 370 K. The peak temperature of the dehydration of the compound has been observed to be 369.304 +/- 0.208 K by means of the heat-capacity measurements. The molar enthalpy, Delta(d)H(m), of the dehydration of the resulting compound was of 16.490 +/- 0.063 kJ mol(-1). The experimental molar heat capacities of the solid from 77 to 353 K and the solid from 370 to 390 K have been, respectively, fitted to tow polynomial equations with the reduced temperatures by least square method. The constant-volume energy of combustion of the compound, Delta(c)U(m), has been determined as being - 1616.15 +/- 0.72 kJ mol(-1) by an RBC-II precision rotating-bomb combustion calorimeter at 298.15 K. The standard molar enthalpy of formation of the compound, Delta(f)H(m)degrees, has been calculated to be - 1114.76 +/- 0.81 kJ mol(-1) from the combination of the data of standard molar enthalpy of combustion of the compound with other auxiliary thermodynamic quantities. (C) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: L-ASCORBIC-ACID ;  CALORIMETER ;  COMPLEXES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000235417100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/97899
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.NW Univ Xian, Dept Chem, Xian 710069, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Qing, W,Chen, SP,Gao, SL,et al. Low-temperature heat-capacity and standard molar enthalpy of formation of copper L-threonate hydrate Cu(C4H6O5)center dot 0.5H(2)O(s)[J]. THERMOCHIMICA ACTA,2006,441(2):132-136.
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