Authors:
M.-H. WangChinese Academy of Sciences Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023

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Z.-C. TanChinese Academy of Sciences Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023

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Q. ShiChinese Academy of Sciences Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023

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L.-X. SunChinese Academy of Sciences Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023

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T. ZhangChinese Academy of Sciences Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023

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Abstract  

The heat capacities of 2-benzoylpyridine were measured with an automated adiabatic calorimeter over the temperature range from 80 to 340 K. The melting point, molar enthalpy, ΔfusHm, and entropy, ΔfusSm, of fusion of this compound were determined to be 316.49±0.04 K, 20.91±0.03 kJ mol–1 and 66.07±0.05 J mol–1 K–1, respectively. The purity of the compound was calculated to be 99.60 mol% by using the fractional melting technique. The thermodynamic functions (HTH298.15) and (STS298.15) were calculated based on the heat capacity measurements in the temperature range of 80–340 K with an interval of 5 K. The thermal properties of the compound were further investigated by differential scanning calorimetry (DSC). From the DSC curve, the temperature corresponding to the maximum evaporation rate, the molar enthalpy and entropy of evaporation were determined to be 556.3±0.1 K, 51.3±0.2 kJ mol–1 and 92.2±0.4 J K–1 mol–1, respectively, under the experimental conditions.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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