298.15K时斯蒂芬酸钾盐和铯盐在水和DMF中的溶解热(英文)  

Solution Heat of Potassium Styphnate and Caesium Styphnate in Water and DMF at 298.15 K

作　　者：刘影[1] 佟文超[1] 杨利[1] 张同来[1] 冯长根[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《物理化学学报》2013年第3期467-472,共6页Acta Physico-Chimica Sinica

基　　金：supported by the Science and Technology Fund on Applied Physical Chemistry Laboratory,China (9140C3703051105,9140C370303120C37142);State Key Laboratory of Explosion Science and Technology,China (QNKT12-02,YBKT10-05)~~

摘　　要：在298.15K时,采用微热量热仪测定斯蒂芬酸钾盐[K2(TNR)(H2O)]n和斯蒂芬酸铯盐[Cs2(TNR)(H2O)2]n两种含能配合物在水和N,N-二甲基甲酰胺(DMF)溶剂中的溶解热,研究其溶解过程和溶解热化学性质.结果表明,两种配合物溶解于水是吸热过程,而溶解于DMF则为放热过程,这主要是由于溶质和溶剂的分子结构及其极性不同而导致的.通过对实验数据计算拟合,求得这两种配合物的溶解焓(ΔsolH)、相对表观摩尔焓(ФLi)、相对偏摩尔焓(Li)及稀释焓(ΔdilH1,2)的经验公式和标准溶解焓值(ΔsolHm).The dissolution and thermochemical properties of potassium styphnate [K2 （TNR） （H2O）] n and cesium styphnate [Cs2 （TNR）（H2O）2 ] n in water and N,N-dimethylformamide （DMF） at 298.15 K were studied by calorimetry.The processes are endothermic in water,and exothermic in DMF because of the different molecular structure and polarity of the solutes and solvents.Empirical formulas for the solution enthalpies （Δ sol H）,relative apparent molar solution enthalpies （ФLi）,relative partial molar enthalpies （Li）,and dilution enthalpies （Δ dil H 1,2） are deduced by polynomial expressions,and standard solution enthalpies （Δ sol H m） are also calculated.

关 键 词：溶解过程 热化学 斯蒂芬酸 溶解焓 稀释焓 

分 类 号：O641.4[理学—物理化学]