Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (05): 573-576.doi: 10.3866/PKU.WHXB20050523

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Thermodynamic Studies of 4-pyridinemethanol

WANG Mei-Han; TAN Zhi-Cheng; SUN Xiao-Hong; SUN Li-Xian; LIU Yuan-Fa; ZHANG Tao   

  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:2004-11-23 Revised:2005-01-11 Published:2005-05-15
  • Contact: TAN Zhi-Cheng

Abstract: 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, ΔfusHm, and molar entropy, ΔfusSm, 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.

Key words: 4-pyridinemethanol, Heat capacity, Thermodynamic functions, Adiabatic calorimetry, TG