Adiabatic heat capacity and related properties of ammonium hexachlororuthenate, (NH4)2RuCl6, at temperatures from 5 ≤ T/K ≤ 325

被引：7

作者：

Weir, Ron D. ^{[1
]}

Westrum, Edgar F., Jr. ^{[1
]}

机构：

[1] Royal Mil Coll Canada, Dept Chem & Chem Engn, Kingston, ON K7K 7B4, Canada

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2014年 / 73卷

关键词：

Ammonium hexachlororuthenate; Heat capacity; (NH4)(2)RuCl6; Hexahalogeno-metallates; THERMODYNAMIC PROPERTIES; ANTIFLUORITE CRYSTALS; NEUTRON-DIFFRACTION; STRUCTURAL-CHANGES; PHASE-TRANSITIONS; SCALE; (ND4)(2)PDCL6; CONVERSION; LATTICE; 350-K;

D O I：

10.1016/j.jct.2013.07.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The heat capacity of ammonium hexachlororuthenate, (NH4)(2)RuCl6, was measured over the temperature range 5 <= T/K <= 325 using adiabatic calorimetry. Our results show that a structural phase transition is not present. However, an anomalous increase in the heat capacity C-p,C-m occurs in the region 70 <= T/K <= 105 and the heat capacity reaches its maximum at T = (93.5 +/- 0.1) K. The molar entropy change associated with this increase amounts to Delta S-m = (0.465 +/- 0.006) R. Standard molar thermodynamic functions are presented at selected temperatures from 5 K to 325 K. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：31 / 35

页数：5

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