| 甲苯热力学性质的研究 |
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| 引用本文： | 南照东 谭志诚. 甲苯热力学性质的研究[J]. 曲阜师范大学学报, 2005, 31(1): 70-72,84 |
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| 作者姓名： | 南照东 谭志诚 |
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| 作者单位： | 曲阜师范大学化学科学学院,273165,山东省曲阜市;中国科学院大连化学物理研究所,116023,辽宁省大连市 |
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| 基金项目： | 国家自然科学基金基金项目 (2 0 0 73 0 47) |
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| 摘 要： | 用小样品全自动低温绝热量热计测量了甲苯在78～350K温区的等压摩尔热容．建立了摩尔热容与热力学温度的函数关系．计算了热力学函数的变化量[H（r）-(298.15K)]和[S(r)-S(298.15K)]．根据Van’t Hoff方程得到了甲苯的纯度．
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| 关 键 词： | 绝热量热 低温 热容 甲苯 |
| 文章编号： | 1001-5337(2005)01-0070-03 |
Study on Thermodynamic Properties of Toluene |
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| Abstract: | The low-temperature heat capacity of toluene was precisely determined by an automated adiabatic calorimeter over the temperature range from 78 to 350 K. The polynomial equations for the molar heat capacity of toluene with respect to the thermodynamic temperature were established through the least-squares fitting. The thermodynamic functions of toluene relative to temperature 298.15 K in the liquid phase were derived based on the relationships of thermodynamic functions. The mass fraction purity of the toluene used in the present calorimetric study was determined to be 99.51 mol% by fraction melting approach. |
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| Keywords: | adiabatic calorimetry low temperature heat capacity toluene |
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