Portland State University. Department of Chemistry
Robert J. O'Brien
Date of Award
Master of Science (M.S.) in Chemistry
1 online resource (100 p.)
A Hitachi Hu 125C transmission electron microscope in which the standard specimen holder was replaced by an environmental cell was used to observe the hydration of sodium chloride crystals. To observe Kelvin curvature and solubility effects sodium chloride crystals which were 0.1u or smaller were of special interest. An electrohome video system attached to the electron microscope was used to record the sodium chloride hydration for subsequent particle measurement and viewing.
A theoretical model was also developed. Thermodynamic properties such as the Kelvin curvature and solubility effects were considered as well as the kinetic expressions for salt dissolution/recrystalization and water evaporation/condensation. A computer program for use on a Honeywell computer was written to perform the required calculations.
The theoretical model was also used in attempts to explain the observed phenomenon of crystal shattering.
Modra, Debra Conway, "A theoretical and experimental examination of sodium chloride hydration" (1984). Dissertations and Theses. Paper 3392.