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Volume-based thermodynamics: Estimations for 2 : 2 salts
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UNSPECIFIED (2006) Volume-based thermodynamics: Estimations for 2 : 2 salts. INORGANIC CHEMISTRY, 45 (4). pp. 1754-1756. doi:10.1021/ic051359x ISSN 0020-1669.
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Official URL: http://dx.doi.org/10.1021/ic051359x
Abstract
The lattice energy of an ionic crystal, U-POT, can be expressed as a linear function of the inverse cube root of its formula unit volume (i.e., V-m(-1/3)); thus, U-POT 2/(alpha/V-m(1/3) + beta), where alpha and beta are fitted constants and I is the readily calculated ionic strength factor of the lattice. The standard entropy, S, is a linear function of V-m itself: S kV(m) + c, with fitted constants k and c. The constants a and beta have previously been evaluated for salts with charge ratios of 1:1, 1:2, and 2:1 and for the general case q:p, while values of k and c applicable to ionic solids generally have earlier been reported. In this paper, we obtain alpha and beta, k and c, specifically for 2:2 salts (by studying the ionic oxides, sulfates, and carbonates), finding that U-POT{MX 2:2}(kJ mol(-1)) approximate to 8(119/V-m(1/3) + 60) and S-o{MX 2:2}/(J K-1 mol(-1)) 1382V(m) + 16.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | INORGANIC CHEMISTRY | ||||
Publisher: | AMER CHEMICAL SOC | ||||
ISSN: | 0020-1669 | ||||
Official Date: | 20 February 2006 | ||||
Dates: |
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Volume: | 45 | ||||
Number: | 4 | ||||
Number of Pages: | 3 | ||||
Page Range: | pp. 1754-1756 | ||||
DOI: | 10.1021/ic051359x | ||||
Publication Status: | Published |
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