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题名: Heat capacity and thermochemical study of trifluoroacetamide (C2H2F3NO)
作者: Di, YY;  Tan, ZC;  Wu, XM;  Meng, SH;  Qu, SS
关键词: trifluoroacetamide ;  heat capacity ;  adiabatic calorimetry ;  phase transition ;  purity determination ;  TG ;  DSC
刊名: THERMOCHIMICA ACTA
发表日期: 2000-08-07
卷: 356, 期:1-2, 页:143-151
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 507
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 capacities of trifluoroacetamide were precisely determined with a small sample precision automated adiabatic calorimeter over the temperature range from 78 to 404 K. A solid-to-solid phase transition, a fusion and a phase transition from a liquid crystalline phase to fully liquid phase have been observed at the temperatures of 336.911+/-0.102, 347.622+/-0.094 and 388.896+/-0.160 K, respectively. The molar enthalpies of these phase transitions as well as the chemical purity of the substance were determined to be 5.576+/-0.004, 11.496+/-0.007, 1.340+/-0.005 kJ mol(-1) and 99.30 mol%, respectively, on the basis of the heat capacity measurements. The molar entropies of the three phase transitions were calculated to be 16.550+/-0.012, 33.071+/-0.029 and 3.447+/-0.027 J mol(-1) K-1, respectively. Further researches of the thermochemical properties for this compound have been carried out by means of TG and DSC techniques. (C) 2000 Elsevier Science B.V. All rights reserved.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000087942800018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85127
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.Wuhan Univ, Coll Chem & Environm Sci, Wuhan 430072, Peoples R China

Recommended Citation:
Di, YY,Tan, ZC,Wu, XM,et al. Heat capacity and thermochemical study of trifluoroacetamide (C2H2F3NO)[J]. THERMOCHIMICA ACTA,2000,356(1-2):143-151.
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