高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (6): 987-991.doi: 10.1007/s40242-015-5263-3
Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol
CHENG Ze1,2, XUE Bin1, TAN Zhicheng2, SHI Quan2
- 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, P. R. China;
2. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian 116023, P. R. China
Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol
CHENG Ze1,2, XUE Bin1, TAN Zhicheng2, SHI Quan2
- 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, P. R. China;
2. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian 116023, P. R. China
摘要：
The heat capacities of D-galactose and galactitol were measured on a quantum design physical property measurement system(PPMS) over a temperature range of 1.9―300 K, and the experimental data were fitted to a function of T using a series of theoretical and empirical models in appropriate temperature ranges. The fit results were used to calculate thermodynamic function values,Cp,mθ,Δ0TSmθ, and Δ0THmθfrom 0 K to 300 K. The standard molar heat capacity, entropy and enthalpy values of D-galactose and galactitol at 298.15 K and 0.1 MPa were determined to be Cp,mθ =(227.96±2.28) and (239.50±2.40) J·K-1·mol-1,Smθ= (211.22±2.11) and (230.82±2.30) J·K-1·mol-1 and = Hmθ (33.95±0.34) and (36.57± 0.37) kJ/mol, respectively.