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Standard absolute entropies, S-298(O), from volume or density - Part II. Organic liquids and solids
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UNSPECIFIED (2004) Standard absolute entropies, S-298(O), from volume or density - Part II. Organic liquids and solids. THERMOCHIMICA ACTA, 414 (2). pp. 125-130. doi:10.1016/j.tca.2003.12.006 ISSN 0040-6031.
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Official URL: http://dx.doi.org/10.1016/j.tca.2003.12.006
Abstract
The standard absolute entropies of many materials are unknown, which precludes a full understanding of their thermodynamic stabilities. We show, for both organic liquids and solids, that entropies are reliably linearly correlated with Volume per molecule, V-m (nm(3) per molecule) (or molar volume, M/rho (cm(3) mol(-1))); thus, permitting simple evaluation of standard entropies (J K-1 mol(-1)) at 298 K. The regression lines generally pass close to the origin, with formulae:
For organic liquids:
S(298)degrees(l) (J K-1 mol(-1)) = 1133(V-m (nm(3) per molecule)) + 44
or
S(298)degrees (l) (J K-1 mol(-1)) = 1.881 [M/rho (cm(3) mol(-1))] + 44
For organic solids:
S(298)degrees (s) (J K-1 mol(-1)) = 774(V-m (nm(3) per molecule)) + 57
or
S(298)degrees (s) (J K-1 mol(-1)) = 1.285 [M/rho (cm(3) mol(-1))] + 57
These results complement similar studies (by ourselves and others) demonstrating linear entropy-volume correlations for ionic solids (including minerals, simple ionic solids and ionic hydrates and solvates), but are now-for the first time-demonstrated for organic materials. Part I of this series of papers [22] applies a similar analysis to ionic solids. (C) 2003 Elsevier B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | THERMOCHIMICA ACTA | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0040-6031 | ||||
Official Date: | 27 May 2004 | ||||
Dates: |
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Volume: | 414 | ||||
Number: | 2 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 125-130 | ||||
DOI: | 10.1016/j.tca.2003.12.006 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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