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Citation: WANG Mei-Han, TAN Zhi-Cheng, SUN Xiao-Hong, SUN Li-Xian, LIU Yuan-Fa, ZHANG Tao. Thermodynamic Studies of 4-pyridinemethanol[J]. Acta Physico-Chimica Sinica, ;2005, 21(05): 573-576. doi: 10.3866/PKU.WHXB20050523 shu

Thermodynamic Studies of 4-pyridinemethanol

1.
Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023； Chemical Research Institute, College of Chemical Engineering, Northwest University, Xi′an 710069

Received Date: 23 November 2004
Available Online: 15 May 2005

The molar heat capacities of 4-pyridinemethanol were measured with a precision automated adiabatic calorimeter over the temperature rang from 79 K to 380 K. No phase transition or other thermal anomaly was observed in the range of 79～301 K. The melting point, molar enthalpy, Δ_fusH_m, and molar entropy, Δ_fusS_m, of fusion for this compound were determined to be 325.12 K, 11.78 kJ•mol^-1 and 36.23 J•K^-1•mol^-1, respectively. The thermodynamic functions relative to the reference temperature (298.15 K) were calculated based on the heat capacity measurements in the temperature range from 80 K to 380 K. The TG-DTG results demonstrated that the maximum rate of mass loss of the sample took place at about 490 K, which corresponds to the boiling temperature of the compound under the experimental conditions.
- 4-pyridinemethanol; Heat capacity; Thermodynamic functions; Adiabatic calorimetry; TG
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