Thermodynamic properties of binary system of 0.716 H2O+0.284 n-C4H9OH

NAN Zhaodong; DENG Yingxia; XUE Xia; TAN Zhicheng

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Thermodynamic properties of binary system of 0.716 H2O+0.284 n-C4H9OH

更新时间：2026-03-26

- Thermodynamic properties of binary system of 0.716 H2O+0.284 n-C4H9OH
- CIESC Journal Vol. 57, Issue 2, (2006)
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- Online First：25 February 2006，
  
  Published：2006
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NAN Zhaodong, DENG Yingxia, XUE Xia, et al. Thermodynamic properties of binary system of 0.716 H2O+0.284 n-C4H9OH[J]. CIESC Journal, 2006, 57(2).
DOI：

NAN Zhaodong, DENG Yingxia, XUE Xia, et al. Thermodynamic properties of binary system of 0.716 H2O+0.284 n-C4H9OH[J]. CIESC Journal, 2006, 57(2). DOI：

摘要

用全自动低温绝热量热计测定了水和正丁醇二元体系（0.716 H2O+0.284 n-C4H9OH）在78～320 K温区的摩尔热容Cp，m.建立了Cp，m与温度T的函数关系.结果表明，该水和正丁醇二元混合体系在（111.9±1.2）K发生玻璃化转变，在（179.26±0.77）K和（269.69±0.14）K发生分别对应正丁醇和水的固液相变.获得了水的相变焓和相变熵.计算了以298.15 K为基准的混合物的热力学函数.

Abstract

The molar heat capacity values of the binary system composed of 0.716 molar fraction H2O+0.284 molar fraction n-C4H9OH were measured by an adiabatic calorimeter in the temperature range from 78 K to 320 K.The functional relationships of heat capacity with respect to thermodynamic temperature were established.Glass-transition occurred at(111.9±1.2)K.The phase transitions took place at (179.26±0.77)K and (269.69±0.14)K corresponding to the solid-liquid phase transitions of n-butanol and water

respectively. The phase-transition enthalpy and entropy of water were calculated. The thermodynamic functions of the binary systems relative to 298.15 K were derived based on the relationships of the thermodynamic functions and the function of the measured heat capacity with respect to temperature.

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