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.