LiCl—NaCl—KCl—MgCl_2—H_2O体系298.15K时的热化学研究  

Heat Capacities, Heats of Dilution and Apparent Molal Enthalpies of LiCl-NaCl-KCl-MgCl_2-H_2O Systems at 298. 15K

作　　者：李积才[1] 王鲁英[1] 翟宗玺[1] 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008

出　　处：《Chinese Journal of Chemical Physics》1996年第1期71-76,共6页化学物理学报（英文）

基　　金：国家自然科学基金资助课题

摘　　要：本文提出了多元电解质溶液体系热容和稀释热的测定方法及表达方式,并将Debye-H(?)ckel焓极限公式应用到多元电解质稀溶液(I<O.1)的表观摩尔焓研究中,获得了多元体系各离子强度下的表观摩尔焓,报导了氯化物型盐湖卤水基本体系LiCl-NaCl-KCl-MgCl_2-H_2O 298.15K时离子强度I为10—0.l范围内的热容和稀释热及离子强度I在18—0.0001范围内的表摩尔焓.Heat capacities and heats of dilution of LiCl-NaCl-KCl-MgCl2-H2O systems have been measured in the range of ionic strength from 18 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 molal enthalpies over the ionic strength from 18 to 0. 0001. The results make clear that the heats of dilution are negative which means that dilution process of various systems are exothermic. When the ionic strength are stronger , the values of heat capacities are smaller and the values of apparent molal en-thalipes are greater.

关 键 词：氯化钾 氯化钠 氯化钾 氯化镁 水 热化学 

分 类 号：O646.16[理学—物理化学]