INVESTIGATIONS OF THE SURFACE LAYER OF LIQUID SYSTEMS. VII. SURFACE DEMIXING AND VOLUME PROPERTIES OF SOLUTIONS OF BINARY SYSTEMS
ARMY BIOLOGICAL LABS FREDERICK MD
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An analysis is presented of the possible relationships between the regions of volume and surface demixing in the coordinates temperature- concentration. Surface demixing is shown to be thermodynamically inevitable. The surface tension and foam stability in the system nitrobenzene-n-hexane has been studied polythermally. The results indicate the existence of surface demixing in this system. Polythermal measurements of the dielectric constant have been carried out on the same system, and also on solutions of cyclohexane in aniline. Two solutions were studied dilatometrically 20 mol- cyclohexane 80 aniline, and 20 mol- methanol 80 mesitylene. The polytherms of the volume properties studied do not show any anomalies at temperature corresponding to surface demixing.
- Physical Chemistry