The design, construction, and testing of a new Knudsen effusion apparatus

被引：224

作者：

Ribeiro da Silva, Manuel A. V. ^{[1
]}

Monte, Manuel J. S. ^{[1
]}

Santos, Luis M. N. B. F. ^{[1
]}

机构：

[1] Univ Porto, Fac Sci, Dept Chem, Ctr Invest Quim, P-4169007 Oporto, Portugal

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2006年 / 38卷 / 06期

关键词：

effusion apparatus; Knudsen effusion; vapour pressures; enthalpy of sublimation; entropy of sublimation; benzoic acid; phenanthrene; anthracene; benzanthrone; 1,3,5-triphenylbenzene;

D O I：

10.1016/j.jct.2005.08.013

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A new Knudsen effusion apparatus, enabling the simultaneous operation of nine effusion cells at three different temperatures, is fully described. The performance of the new apparatus was checked by measuring the vapour pressures, between 0.1 Pa and 1 Pa, over ca. 20 K temperature intervals of benzoic acid, phenanthrene, anthracene, benzanthrone, and 1,3,5-triphenylbenzene. The derived standard molar enthalpies of sublimation are in excellent agreement with the mean of the literature values available for these five compounds and with the recommended values for four of them. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：778 / 787

页数：10

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