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Heat capacity and thermochemical study of trifluoroacetamide (C2H2F3NO)
Di, YY; Tan, ZC; Wu, XM; Meng, SH; Qu, SS
KeywordTrifluoroacetamide Heat Capacity Adiabatic Calorimetry Phase Transition Purity Determination Tg Dsc
Source PublicationTHERMOCHIMICA ACTA
2000-08-07
Volume356Issue:1-2Pages:143-151
Indexed BySCI
SubtypeArticle
Department5
Funding Project507
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Analytical ; Chemistry, Physical
WOS Research AreaChemistry
AbstractThe 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.
Language英语
URL查看原文
WOS IDWOS:000087942800018
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/85127
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Di, YY,Tan, ZC,Wu, XM,Meng, SH,&Qu, SS.(2000).Heat capacity and thermochemical study of trifluoroacetamide (C2H2F3NO).THERMOCHIMICA ACTA,356(1-2),143-151.
MLA Di, YY,et al."Heat capacity and thermochemical study of trifluoroacetamide (C2H2F3NO)".THERMOCHIMICA ACTA 356.1-2(2000):143-151.
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