Characteristic property in aqueous solutions: effect of iceberg formation of water surrounding solute on the solubility(or cmc) and its peculiar temperature dependence. |
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| Affiliation: | 1. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India;2. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India;3. ISIS Pulsed Neutron and Muon Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK;1. Department of Gastroenterology and Metabolism, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan;2. Department of Endoscopy and Medicine, Hiroshima University, Hiroshima, Japan;1. Chair for Crystallography and Structural Physics, Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;2. Computational Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;3. Institut Laue-Langevin (ILL), Science Division, Grenoble, France;4. Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching bei München, Germany |
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| Abstract: | The solubilities and the peculiar temperature dependence of hydrophobic substances in water were coherently explained in 1977 taking into account 1) the strong solidification tendency of water, 2) the large enthalpy of solution evident from the low solubilities, 3) the large entropy of dilution due to the small solubility, and 4) the large negative enthalpy and entropy of iceberg formation. As far as the author knows, there is no paper contradicting this interpretation. The present paper reviews the thermodynamic reasoning and experimental evidences confirming the interpretation. The phenomena are now much better understood due to new experimental evidences. |
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