Low-temperature heat capacities and derived thermodynamic functions of cyclohexane
Nan, ZD; Tan, ZC
KeywordAdiabatic Calorimetry Cyclohexane Heat Capacity Sample Container Thermodynamic Function
Indexed BySCI
Funding Project1504
Contribution Rank2;2
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Analytical ; Chemistry, Physical
WOS Research AreaChemistry
AbstractThe low-temperature heat capacities of cyclohexane were measured in the temperature range from 78 to 350 K by means of an automatic adiabatic calorimeter equipped with a new sample container adapted to measure heat capacities of liquids. The sample container was described in detail. The performance of this calorimetric apparatus was evaluated by heat capacity measurements on water. The deviations of experimental heat capacities from the corresponding smoothed values lie within +/-0.3%, while the inaccuracy is within +/-0.4%, compared with the reference data in the whole experimental temperature range. Two kinds of phase transitions were found at 186.065 and 279.684 K corresponding solid-solid and solid-liquid phase transitions, respectively. The entropy and enthalpy of the phase transition, as well as the thermodynamic functions {H-(T)- H-298.15 K} and {S-(T)-S-298.15 K}, were derived from the heat capacity data. The mass fraction purity of cyclohexane sample used in the present calorimetric study was determined to be 99.9965% by fraction melting approach.
WOS IDWOS:000222091300027
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Cited Times:23[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.Qufu Normal Univ, Dept Chem, Shandong 273165, Peoples R China
Recommended Citation
GB/T 7714
Nan, ZD,Tan, ZC. Low-temperature heat capacities and derived thermodynamic functions of cyclohexane[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2004,76(3):955-963.
APA Nan, ZD,&Tan, ZC.(2004).Low-temperature heat capacities and derived thermodynamic functions of cyclohexane.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,76(3),955-963.
MLA Nan, ZD,et al."Low-temperature heat capacities and derived thermodynamic functions of cyclohexane".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 76.3(2004):955-963.
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