Thermodynamics provides a powerful tool for the study of the interactions between solutes and water in aqueous solutions, and provides many insights into the nature of these interactions. The methods of thermodynamics have, however, one serious limitation in that they give information only on the average properties of the macrosystem, and are unable to give any direct information on the microscopic structure and properties of the system. In the case of dilute aqueous systems, for example, this means that only the bulk properties of the solvent water can be studied directly, although the use of suitable models for the structure of bulk water allows computation of the properties of the postulated hydrated components to be carried out. Such models, however, are not unique, and care must be taken to ensure that the model chosen to represent bulk water is in every way consistent with the known properties of bulk water. An understanding of the behavior of such solutions must therefore be based on information gained from as wide a variety of techniques as possible.
KeywordsLower Critical Solution Temperature Infinite Dilution Propylene Carbonate Solute Molecule Cyclic Ether
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