Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
216818 | The Journal of Chemical Thermodynamics | 2006 | 10 Pages |
Abstract
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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Manuel A.V. Ribeiro da Silva, Manuel J.S. Monte, Luís M.N.B.F. Santos,