| 离子液体[Emim]Br水溶液的比热容测量及其模型化 |
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| 引用本文： | 魏治,武向红,郑丹星,王建召,董丽.离子液体[Emim]Br水溶液的比热容测量及其模型化[J].北京化工大学学报(自然科学版),2010,37(1):9-12. |
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| 作者姓名： | 魏治 武向红 郑丹星 王建召 董丽 |
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| 作者单位： | 北京化工大学 化学工程学院， 北京 100029 |
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| 基金项目： | 国家自然科学基金(50890184) |
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| 摘 要： | 在温度为298~343 K,质量分数为10%~90%的条件下,使用BT2.15型Calvet微量量热仪测定了离子液体Emim]Br水溶液的定压比热容数据,并建立了体系的比热容与温度和浓度的经验关联式,拟合的平均偏差为0.42%。通过比热容实验数据,计算了溶液体系的超额摩尔比热容,发现相对于理想溶液呈正偏差,并随着浓度和温度的增加而增大。
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| 关 键 词： | 离子液体 [Emim]Br 比热容 Calvet微量量热仪 |
| 收稿时间： | 2009-03-03 |
Determination of the heat capacity of aqueous solutions of [Emim] Br |
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| WEI Zhi,WU XiangHong,ZHENG DanXing,WANG JianZhao,DONG Li.Determination of the heat capacity of aqueous solutions of [Emim] Br[J].Journal of Beijing University of Chemical Technology,2010,37(1):9-12. |
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| Authors: | WEI Zhi WU XiangHong ZHENG DanXing WANG JianZhao DONG Li |
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| Institution: | College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | The heat capacities of the ionic liquid Emim]Br(1-ethyl-3-methylimidazolium bromide) and its aqueous solutions with concentrations of 10%-90% have been measured in the temperature range 298K to 343K using a Calvet microcalorimeter.An equation for the dependence of the heat capacity on temperature and concentration was derived.The average deviation between the values given by this equation and the experimental values was 0.42%.Based on the experimental data,the excess molar heat capacities(cpE) for the Emi... |
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| Keywords: | [Emim]Br ionic liquids 1-ethyl-3-methylimidazolium bromide ([Emim] Br) heat capacity Calvet microcalo-rimetry |
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