The heat of transfer of some slightly soluble salts from water to tert-Butanol--water mixtures

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Linford Lawrence Bright (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
John Jezorek

Abstract: A group of slightly soluble salts have been investigated as probes in the study of water structure in organic--aqueous solvent systems. The probe reactions were run in pure water as well as tert-butanol—water mixtures at about 25°C. The enthalpies for AgI, AgTPB, and TPAsTPB precipitation were plotted versus mol % tert-butanol and these exhibited exothermic maxima at approximately 5.3 mol % tert-butanol. The maxima observed are discussed in terms of the contributions to the overall enthalpy change, and thought to be dependent on the structure of the solutions and the structure altering characteristics of the ions involved. From the results of this investigation it was apparent that precipitation reactions can be useful in the study of water structure and water—solvent interaction. The precipitation reactions of AgTPB and TPAsTPB showed very large maxima of about 15 and 27 kcal respectively for the heats of transfer. Therefore AgTPB and TPAsTPB are shown to be excellent probes and should prove very useful in the investigation of other organic—aqueous binary systems. A further, tentative result is that TPB appears to be a structure making ion, from ?S calculations in pure water.

Additional Information

Language: English
Date: 1973
Heat $x Transmission
Heat of solution
Water $x Thermal properties

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