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The Kirkwood-Buff Integrals for One-Component Liquids



Yedhud A. Ben-Naim


The Kirkwood-Buff integrals (KBIs) for one-component systems are calculated from either the pair correlation functions or from experimental macroscopic quantities. As in the case of mixtures, the KBIs provide important information on the local densities around a molecule. In the low density limit (? ? 0) one can extract from the KBI, some information on the strength of the intermolecular forces. No such information may be extracted from the KBIs at higher densities. We used experimental data on densities and isothermal compressibilities to calculate the KBIs for various liquids ranging from inert molecules, to hydrocarbons, alcohols and liquid water.
Journal of Chemical Physics


Kirkwood-Buff Theroy, statistical mechanics, theory of liquids, theory of solutions


Ben-Naim, Y. (2008), The Kirkwood-Buff Integrals for One-Component Liquids, Journal of Chemical Physics, [online], (Accessed May 24, 2024)


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Created June 16, 2008, Updated February 17, 2017