Study on conductance of supersaturated chloride microdroplets  

作　　者：HE KeJuan CHENG Hua ZHU YanYing WANG LiangYu ZHANG YunHong 

机构地区：[1]Institute for Chemical Physics,School of Science,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Science China Chemistry》2009年第7期879-886,共8页中国科学（化学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 20673010 and 20605004);Fundamental Research Foundation of BIT (Grant No. 20060742003);Program of Introducing Talents of Discipline to Universities (Grant No. B07012);China Postdoctoral Science Foundation (Grant No. 20070410467)

摘　　要：By using the measuring system previously designed by the authors, the conductance of KCl, NaCl and NH4Cl microdroplets is obtained in the whole measuring RH range, especially in the supersaturation region, which cannot be acquired from the bulk solutions and fills the gap of lack of experimental data of conductance under the supersaturated state. The ERH and DRH of these three kinds of microdroplets observed from a microscope are 80.5% and 95.4% (KCl), 75.7% and 93.3% (NaCl), and 69.9% and 96.6% (NH4Cl), respectively. In addition, it can be found from the dependence of conductance on RH that conductance is very sensitive to the existence of water molecules inside the microdroplet and the threshold of the deliquescence process can be predicted by the variation of conductance.By using the measuring system previously designed by the authors, the conductance of KCl, NaCl and NH4Cl microdroplets is obtained in the whole measuring RH range, especially in the supersaturation region, which cannot be acquired from the bulk solutions and fills the gap of lack of experimental data of conductance under the supersaturated state. The ERH and DRH of these three kinds of microdroplets observed from a microscope are 80.5% and 95.4% (KCl), 75.7% and 93.3% (NaCl), and 69.9% and 96.6% (NH4Cl), respectively. In addition, it can be found from the dependence of conductance on RH that conductance is very sensitive to the existence of water molecules inside the microdroplet and the threshold of the deliquescence process can be predicted by the variation of conductance.

关 键 词：CONDUCTANCE SUPERSATURATION MICRODROPLET CHLORIDE sodium CHLORIDE potassium CHLORIDE AMMONIUM CHLORIDE 

分 类 号：O621.3[理学—有机化学]