Enthalpy and Heat Capacity Data for 1,2-Cyclohexanediol  

作　　者：周彩荣 章亚东 蒋登高 

机构地区：[1]College of Chemical Engineering, Zhengzhou University Zhengzhou 450002, China

出　　处：《Chinese Journal of Chemical Engineering》2003年第5期598-600,共3页中国化学工程学报（英文版）

基　　金：Natural Science Foundation of Henan Province(No.0211020800)

摘　　要：The thermodynamic properties of different geometric structures of 1,2-cyclohexanediol which were rarely reported in literature, such as combustion enthalpy, formation enthalpy, melting enthalpy and heat ca-pacities, were determined by NETZSCH DSC 204 Scanning Calorimeter. The relationship between the melting point and the composition for the mixture system of cis-1,2-cyclohexanediol and trans-1,2-cyclohexanediol was investigated and corresponding phase diagram was obtained. 'The melting enthalpies of both cis-1,2-cyclohexanediol and trans-1,2-cyclohexanediol are 20.265kJ·mol-1 and 16.368kJ·mol-1 respectively. The standard combustion enthalpies of cia- and trans-1,2-cyclohexaneddiol were determined by calorimeter. They are respec-tively -3507.043 kJ·mol-1 and - 3497.8 kJ·mol-1 at 298.15 K.The standard formation enthalpies are respectively 568.997 kJ·mol-1 and 578.240 kJ·mol-1 for cia- and trans -1,2-cyclohexaneddiol.The thermodynamic properties of different geometric structures of 1,2-cyclohexanediol which were rarely reported in literature, such as combustion enthalpy, formation enthalpy, melting enthalpy and heat capacities, were determined by NETZSCH DSC 204 Scanning Calorimeter. The relationship between the melting point and the composition for the mixture system of cis-l,2-cyclohexanediol and trans-l,2-cyclohexanediol was investigated and corresponding phase diagram was obtained. 'The melting enthalpies of both cis-l,2-cyclohexanediol and trans-l,2-cyclohexanediol are 20.265 kJ·mo1^-1 and 16.368 kJ·mo1^-1 respectively. The standard combustion enthalpies of cis- and trans-l,2-cyclohexaneddiol were determined by calorimeter. They are respectively -3507.043kJ·mo1^-1 and -3497.8kJ·mo1^-1 at 298.15 K.The standard formation enthalpies are respectively 568.997kJ·mol^-1 and 578.240kJ·mol^-1 for cis- and trans-1,2-cyclohexaneddiol.

关 键 词：1 2-CYCLOHEXANEDIOL melting point melting enthalpy heat capacity combustion enthalpy formation enthalpy 

分 类 号：O642[理学—物理化学]