| 1,2-丙二醇水溶液在不同温度下的超额摩尔体积黏度和热容 |
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| 引用本文： | 杨长生,马沛生,唐多强,靳凤民.1,2-丙二醇水溶液在不同温度下的超额摩尔体积黏度和热容[J].中国化学工程学报,2003,11(2):175-180. |
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| 作者姓名： | 杨长生 马沛生 唐多强 靳凤民 |
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| 作者单位： | State Key Lab of C1 Chemistry and Technology，School of Chemical Engineering and Technology，Tianjin University，State Key Lab of C1 Chemistry and Technology，School of Chemical Engineering and Technology，Tianjin University，State Key Lab of C1 Chemistry and Technology，School of Chemical Engineering and Technology，Tianjin University，State Key Lab of C1 Chemistry and Technology，School of Chemical Engineering and Technology，Tianjin University Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China |
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| 基金项目： | Supported by China Petroleum ＆ Chemical Corporation (No.200049). |
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| 摘 要： | Experimental densities, viscosities and heat capacities at different temperatures were presented over the entire mole fraction range for the binary mixture of 1,2-propanediol and water. Density values were used in the determination of excess molar volumes, VE. At the same time, the excess viscosity was investigated. The values of VE and E were fitted to the Redlich-Kister equation. Good agreement was observed. The excess volumes are negative over the entire range of composition. They show an U-shaped-concentration dependence and decrease in absolute values with increase of temperature. Values of E are negative over the entire range of the composition, and has a trend very similar to that of VE . The analysis shows that at any temperature the specific heat of mixture is a linear function of the composition as x1 > 20%. All the extended lines intersect at one point. An empirical equation is obtained to calculate the specific heat to mixture at any composition and temperature in the experimental range.
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| 关 键 词： | l，2－丙二醇水溶液 温度 超额摩尔体积 粘度 热容 |
| 修稿时间： | |
Excess Molar Volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water at Different Temperatures |
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| YANG Changsheng,MA Peisheng,TANG Duoqiang,JIN Fengmin.Excess Molar Volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water at Different Temperatures[J].Chinese Journal of Chemical Engineering,2003,11(2):175-180. |
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| Authors: | YANG Changsheng MA Peisheng TANG Duoqiang JIN Fengmin |
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| Affiliation: | State Key Lab of C1 Chemistry and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | Experimental densities, viscosities and heat capacities at different temperatures were presented over the entire mole fraction range for the binary mixture of 1,2-propanediol and water. Density values were used in the determination of excess molar volumes, VE. At the same time, the excess viscosity was investigated. The values of VE and E were fitted to the Redlich-Kister equation. Good agreement was observed. The excess volumes are negative over the entire range of composition. They show an U-shaped-concentration dependence and decrease in absolute values with increase of temperature. Values of E are negative over the entire range of the composition, and has a trend very similar to that of VE . The analysis shows that at any temperature the specific heat of mixture is a linear function of the composition as x1 > 20%. All the extended lines intersect at one point. An empirical equation is obtained to calculate the specific heat to mixture at any composition and temperature in the experimental range. |
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| Keywords: | viscosity heat capacity density excess molar volume molecular interaction |
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