Studies on excess properties of alcohol + water /
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| Other Authors: | , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1988.
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| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | Excess volumes and enthalpies of 2-methyl-2-propanol + water are reported which were measured directly using a dilution dilatometer and an isothermal displacement calorimeter, respectively. A modified switching function which provides superior performance to that of other excess functions is proposed to represent the sigmoid shaped excess enthalpies of 2-methyl-2-propanol + water mixtures. Vapor-liquid-equilibrium (V-L-E) for methanol + water, ethanol + water, propanol + water and 2-methyl-2-propanol + water are described from 308.15 to 348.15 K by combining the Gibbs-Helmholtz relation, measured excess enthalpies and excess Gibbs free energies at a reference temperature. The anomalous behavior of alcohol + water mixture is analyzed based on the excess properties and the significant nonideality in the infinite dilute alcohol is explained using the two-liquid theory. The structural change of water at infinite dilution of the alcohol in water cause more significant nonideality than the alcohol-alcohol association. The negative excess entropy in the infinitely dilute alcohol region also indicates a structural change of the water solvent. As the bulk or length of the alkyl group in the alcohol increase, the deviation of aqueous alcohol solutions from ideal solution behavior tends to increase. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Chemical Engineering." |
| Physical Description: | xiv, 139 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references (leaves 125-133). |