University of Tasmania

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The adsorption of vapours onto a mercury surface.

posted on 2023-05-27, 15:55 authored by Perry, GH
The literature reports widely varying adsorption isotherms for the adsorption of the members of the R-OH series on mercury, where R = H,CH3,C2H5,C3H7. By following the variation in the height of the sessile drop of mercury this research investigates the adsorption of members of the series R-OD where R = D,CH3,C2H5,C3H 7 . Deuteration of the -OH group produces the following effects: 1. All the surface pressure TT vs vapour pressure p isotherms are (a) displaced-to lower surface pressures indicating a weaker adsorption, (b) less convex or initially concave to the it axis suggesting reduced adsorbent-adsorbate interaction relative to the adsorbate-adsorbate molecule interaction for the R-OD series. 2. Produces films which are more condensed. 3. Lowers the heat of adsorption by 5 k cal mole -1or more. L. Produces more stable reproducible films. The area per molecule determined for the adsorbed monolayer film agrees with the value calculated for a molecule lying flat on the surface. The adsorption behaviour of the R-OD series is dcminated by the increased and stronger intermolecular hydrogen bonding in the deuterated adsorbate as compared to the undeuterated species.


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Copyright the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from copyright owner(s). Thesis (M.Sc.)--University of Tasmania, 1973. Bibliography: l. 236-242.

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