HEAT-CAPACITIES OF BIS-TETRAETHYLAMMONIUM TETRACHLORONICKELATE AND TETRACHLOROZINCATE .1. STRUCTURAL TRANSITIONS AND THERMOPHYSICAL RESULTS

被引：20

作者：

LANDEE, CP ^{[1
]}

WESTRUM, EF ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 1979年 / 11卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0021-9614(79)90149-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The heat capacities of bis-tetraethylammonium tetrachloronickelate (bean) and tetrachlorozincate (beaz) were measured over the temperature range 5 to 350 K by adiabatic calorimetry. Bifurcated anomalies were found for both compounds with the temperatures of the maxima occurring at (222.1 ± 0.1) K and (222.7 ± 0.1) K for bean and at (227.9 ± 0.2) K and (228.9 ± 0.2) K for beaz. The excess entropies associated with the transition regions were 9.16 and 9.96 calth K-1 mol-1 respectively. Both transition regions were characterized by equilibrium times of several days. Selected thermal functions Cpo, So, and -{Go(T) - Ho(0)} T at 298.15 K are, respectively, 151.7, 185.33, and 92.16 calth K-1 mol-1 for bean and 153.0, 181.52, and 88.53 calth K-1 mol-1 for beaz. © 1979.

引用

页码：247 / 260

页数：14