The molar heat capacity of hydrous copper chloride: Atacamite Cu2Cl(OH)(3)

被引：8

作者：

Bisengalieva, MR

Kiseleva, IA

Melchakova, LV

Ogorodova, LP

Gurevich, AM

机构：

[1] MOSCOW MV LOMONOSOV STATE UNIV, DEPT GEOL, MOSCOW 119899, RUSSIA

[2] KAZAKH ACAD SCI, INST CHEM MET, KARAGANDA 470032, KAZAKHSTAN

[3] UKRAINIAN ACAD SCI, INST LOW TEMP ENGN PHYS, UA-310164 KHARKOV, UKRAINE

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 1997年 / 29卷 / 03期

关键词：

calorimetry; entropy; heat capacity; atacamite;

D O I：

10.1006/jcht.1996.0162

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The heat capacity of natural atacamite has been measured between T = 2 K and T = 305 K by cryogenic-adiabatic calorimetry. At T = 298.15 K, the standard molar heat capacity C(p,m)degrees and entropy S-m degrees for atacamite are (19.16 +/- 0.07).R and (20.18 +/- 0.08).R (where R = 8.3144 J.K-1.mol(-1)), respectively. The heat capacity exibits anomalous behaviour at temperatures lower than 10.5 K. Smoothed thermodynamic properties: molar heat capacity; molar entropy increment Delta(0)(T)S(m) degrees; and (Phi(m) degrees + Delta(0)(T)H(m) degrees/T), where T = 298.15 K, have been calculated. Between T = 290 K and T = 508 K the heat capacity of atacamite measured by d.s.c. is represented by the equation: C(p,m)degrees/R = 18.80 + 8.11.10(-3).(T/K) - 1.87.10(-5).(K/T)(2). (C) 1997 Academic Press Limited.

引用

页码：345 / 352

页数：8