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0.716 H_2O+0.284 n-C_4H_9OH二元体系的热力学性质 被引量：1

Thermodynamic properties of binary system of 0.716 H_2O+0.284 n-C_4H_9OH
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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（0．716H2O＋0．284n—C4H9OH）在78-320K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298．15K为基准的混合物的热力学函数． The molar heat capacity values of the binary system composed of 0.716 molar fraction H2O＋ 0. 284 molar fraction n-C4 H9OH 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.
作者 南照东 邓英霞 薛霞 谭志诚
机构地区 曲阜师范大学化学科学学院 中国科学院大连化学物理研究所热化学实验室
出处 《化工学报》 EI CAS CSCD 北大核心 2006年第2期237-240,共4页 CIESC Journal
基金 国家自然科学基金项目(20373072) 山东省博士基金项目.~~
关键词 绝热量热法 热容 热力学 水 正丁醇 adiabatic calorimetry heat capacity thermodynamics water n-butanol
分类号 O642.42 [理学—物理化学] O623.11 [理学—有机化学]
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共引文献3

同被引文献14

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化工学报
2006年 第2期

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