Relation between standard entropies of elements and electronic configurations

Citation
Ds. Al et al., Relation between standard entropies of elements and electronic configurations, CHIN SCI B, 44(3), 1999, pp. 270-273
Citations number
6
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
10016538 → ACNP
Volume
44
Issue
3
Year of publication
1999
Pages
270 - 273
Database
ISI
SICI code
1001-6538(199902)44:3<270:RBSEOE>2.0.ZU;2-9
Abstract
A close relationship has been found between the standard entropies of eleme nts and their electronic configurations. Based on the positions of elements in the periodic table and the variation in the standard entropies of eleme nts, the standard entropies of elements can be expressed as the sum of two functions: S-0 = f(N) + f(E), where SO is the standard entropy of an elemen t, N the principal quantum number, and E the number of outermost electrons. And the specific formula is S-0 = 99.05N(1/3) + [0.32(sp - 4)(4) - 119.76] + [ - 56.56N(1/3) + 0.70(sd - 7)(2) - 42.12] + [- 11.95 x 10(-4)(df - 8)(4) - 105.70], where sp, sd, df are the numbers of the outermost electrons in the sp, sd, df regions of the periodic table, respectively. This formula helps reveal t he essence of the standard entropies of elements and deepens our understand ing of the thermodynamic characteristics of compounds.