复盐K_2Zn(IO_3)_4·2H_2O的热化学研究  

THERMOCHEMICAL INVESTIGATION OF A DOUBLE SALT K\-2Zn(IO\-3)\-4·2H\-2O

作　　者：胡军成[1] 万洪文[1] 许名飞[1] 望天志 屈松生[2] 

机构地区：[1]华中师范大学化学系,武汉430079 [2]武汉大学化学学院,武汉430072

出　　处：《无机化学学报》1999年第5期689-692,共4页Chinese Journal of Inorganic Chemistry

基　　金：湖北省科委九五攻关项目

摘　　要：The standard enthalpy of formation ( Δ \-f H\+\+ \-\-m[K\-2Zn(IO\-3)\-4·2H\-2O,s,298.2K]=-2210.68 kJ·mol\+\{-1\}) of a double salt K\-2Zn(IO\-3)\-4·2H\-2O is determined by solution calorimetry in a isoperibel reaction calorimeter. The calorimetric solvent is an acid solution consisting of 3 mol·L\+\{-1\} HNO\-3. Accoding to the HESS Law, we designed a rational thermochemical cycle. Simultaneously, the Δ \-f H\+\+ \-\-\{m 298.2K\} was calculated from the data of the DSC curve. The values obtained by the two methods were compared.The standard enthalpy of formation ( Δ \-f H\+\+ \-\-m[K\-2Zn(IO\-3)\-4·2H\-2O,s,298.2K]=-2210.68 kJ·mol\+\{-1\}) of a double salt K\-2Zn(IO\-3)\-4·2H\-2O is determined by solution calorimetry in a isoperibel reaction calorimeter. The calorimetric solvent is an acid solution consisting of 3 mol·L\+\{-1\} HNO\-3. Accoding to the HESS Law, we designed a rational thermochemical cycle. Simultaneously, the Δ \-f H\+\+ \-\-\{m 298.2K\} was calculated from the data of the DSC curve. The values obtained by the two methods were compared.

关 键 词：复盐 碘酸盐 量热法 热化学 钾 锌 

分 类 号：O614.241[理学—无机化学] O614.113[理学—化学]