NaCl─KCl─MgCl_2─H_2O体系298．15K时稀释热、热容和相对  

Study on Heat Capacity, Heat of Dilution and apparent molar enthalpies of NaCl─KCl─MgCl_2─H_2O quaternary systems at 298. 15K

作　　者：王鲁英[1] 李积才[1] 翟宗玺[1] 

机构地区：[1]中国科学院青海盐湖研究所

出　　处：《盐湖研究》1995年第1期52-56,共5页Journal of Salt Lake Research

摘　　要：采用连续滴定量热法测定了四元体系ＮａＣｌ─ＫＣｌ─ＭｇＣｌ２─Ｈ２Ｏ２９８．１５Ｋ时在离子强度为０．１─１２．３９范围内的热容、稀释热和相对表观摩尔焓值，结果表明，随该体系离子强度的减小，其热容值增大，表观摩尔焓值减小，该体系的稀释过程为放热，稀释热的大小取决于稀释起始离子强度与最终离子强度之间的差值。Heat capacity and heat of dilution of NaCl─KCI─MgCl2─H2O quaternary system have been measured in the range of ionic strength from 12 to 0. 1 at 298. 15K. The data of the heat of dilution have been extrapolated to infinite dilution by use of the Debye-Huckel limiting law to obtain relative apparent molar enthalpy.The results show clear that the heat of dilution is negative while the dilution process of the system is exothermic. The ionic strength increases with the values of heat capacity decteasing and the values of apparent molal enthalpy increasing.

关 键 词：氯化物 稀释热 热容 相对表观摩尔焓 

分 类 号：O613.42[理学—无机化学]