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
Indexed BySCI
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.
WOS IDWOS:000087942800018
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Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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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