Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (05): 594-596.doi: 10.3866/PKU.WHXB19890517

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HEAT CAPACITY AND PHASE TRANSITION OF 2,2-BISHYDROXYMETHYL-1, 3-PROPANEDIOL BETWEEN 275 AND 510 K

Zhang Zhiying*; Yang Xuejun; Yang Menglin   

  1. Thermochemistry Laboratory; Northwestern University; Xi'an
  • Received:1988-03-24 Revised:1988-10-04 Published:1989-10-15
  • Contact: Zhang Zhiying

Abstract: The heat capacity of 2,2-bishydroxymethyl-1,3-propanediol was measured over the temperature range 275 to 510 K by means of an automated adiabatic calorimeter. A solid-solid phase transition was found at 416.60 K. The enthalpy and entropy of the transition were determined to be 41.37 kJ tool~(-1) and 89.62 J K~(-1) mol~(-1) respectively. Using the enthalpy of the transition, the destroyed average hydrogen bond energy of the compound was deduced to be 9.69 kJ mol~(-1).