Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol

doi:10.1007/s40242-015-5263-3

Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (6): 987-991.doi: 10.1007/s40242-015-5263-3

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Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol

CHENG Ze^1,2, 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

Received:2015-07-08 Revised:2015-08-13 Online:2015-11-01 Published:2015-11-02
Contact: SHI Quan, XUE Bin E-mail:shiquan@dicp.ac.cn;xue-b@163.com
Supported by:
Supported by the National Natural Science Foundation of China(No.21473198).

Abstract

Abstract:

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,C_p,m^θ,Δ₀^TS_m^θ, and Δ₀^TH_m^θfrom 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 C_p,m^θ =(227.96±2.28) and (239.50±2.40) J·K^-1·mol^-1,S_m^θ= (211.22±2.11) and (230.82±2.30) J·K^-1·mol^-1 and = H_m^θ (33.95±0.34) and (36.57± 0.37) kJ/mol, respectively.

Key words: D-Galactose, Galactitol, Low-temperature heat capacity, Physical property measurement system(PPMS), Standard thermodynamic function

CHENG Ze, XUE Bin, TAN Zhicheng, SHI Quan. Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol[J]. Chemical Research in Chinese Universities, 2015, 31(6): 987-991.

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Low-temperature Heat Capacity and Standard Thermodynamic Functions of D-Galactose and Galactitol

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