物理化学学报 >> 1993, Vol. 9 >> Issue (06): 802-807.doi: 10.3866/PKU.WHXB19930615

研究论文 上一篇    下一篇

(n-C18H37NH3)2MCl4热容的测定

徐瑞云; 孔德俊; 蔡显鄂; 朱京   

  1. 上海化工高等专科学校,上海 200233;复旦大学化学系,上海 200433
  • 收稿日期:1992-04-24 修回日期:1992-11-09 发布日期:1993-12-15
  • 通讯作者: 徐瑞云

Measurement of Capacitied for (n-C18H37NH3)2MCl4

Xu Rui-Yun; Kong De-Jun; Cai Xian-E; Zhu Jing   

  1. Shanghai Institute of Chemical Technology, Shanghai 200233; Department of Chemistry, Fudan University, Shanghai 200433
  • Received:1992-04-24 Revised:1992-11-09 Published:1993-12-15
  • Contact: Xu Rui-Yun

摘要: 在差示扫描量热仪(DSC仪)上, 采用扫描热焓法测定物质的热容, 实验精度达到±1%左右. 在190-410 K温度区间内, 测定了四氯合金属酸(Ⅱ)正十八铵(n-C_(18)H_(37)NH_3)_2MCl_4(M=Mn和Zn; 简称C_(18)M)的热容. 同时测定了C_(18)M的固-固相变焓和相变熵. 本文报导了C_(18)M每隔5 K的热力学函数.

关键词: 扫描量热法, 热容, 固-固相变焓, 四氯合金属酸(II)正十八铵

Abstract: The heat capacities of samples were measured by Differential Scanning Calorimetry(DSC), using scanning enthalpy method. The accuracy of the heat capacity measurements was appoximately 1 per cent by the method. The heat capacities of bis(n-octadecylammonium) tetrachlorometal-iates (Ⅱ), (n-C_(18)H_(37)NH_3)_2MCl_4 (M=Mn, Zn; short notation C_(18)M), were measured from 190 to 410 K. The enthalpies and entropies of the solid-solid phase transitions for C_(18)M were calculated. The selected thermodynamic functions were given at intervals of 5 K from 190 to 410 K.

Key words: Scanning enthalpy method, Heat capacity, Solid-solid phase transition enthalpy, Bis(n-octadecylammonium) tetrachloro-metallated(II)