CoOOH的热力学性质  

Thermodynamic porperties of CoOOH

作　　者：田庆华[1] 辛云涛[1] 毛芳芳[1] 王恒利[1] 郭学益[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《中国有色金属学报》2015年第2期472-478,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51104181)

摘　　要：利用渐近法计算并得到在臭氧氧化体系下CoOOH在水溶液中的准溶解平衡常数,并通过换算得到在臭氧氧化体系下溶液中钴离子浓度溶解平衡与p H值的关系。采用同步热分析仪(DSC-TGA)测定CoOOH粉末加热并分解得到Co3O4时在常温到516 K温度范围内的恒压热流,并得到在恒压条件下加热过程的DSC曲线。利用三线法得到CoOOH的摩尔定压热容,并且拟合CoOOH粉末的摩尔定压热容与温度的函数关系式;利用相关物质的已知热力学参数,设计热力学循环,计算在标准压强和298.15 K时CoOOH粉末的标准生成热力学函数。The pseudo solubility-product constant of CoOOH was detected by the asymptotic method, and then the relationship between precipitation-dissolution equilibrium of cobalt and pH value was calculated in the acid-oxidation system of ozone. The DSC curve and heat flow of CoOOH powders were detected by DSC-TGA in the range of room temperature to 516 KI where the CoOOH decomposed. The molar heat capacity of CoOOH powders was calculated by three-line method and the fitting function of molar heat capacity at constant pressure and temperature was obtained. The thermodynamic cycle was designed based on the known thermodynamic data, the standard thermodynamic functions of CoOOH under slandard pressure at temperature of 298.15 K were calculated.

关 键 词：COOOH 臭氧 溶解平衡 热容 标准热力学函数 

分 类 号：O642[理学—物理化学]