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The adsorption of nitrogen and argon by evaporated films of sodium chloride
An ultra-high vacuum apparatus has been designed and constructed. Pressures of the order of 1 x 10⁻⁸ torr have been attained routinely. The adsorption of nitrogen by Pyrex has been investigated and the results obtained have shown good agreement with those in the literature. Rigorously cleaned evapo...
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| Format: | Thesis |
| Language: | English |
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Department of Chemistry
2016
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| _version_ | 1867613173785296896 |
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| access_status_str | Open Access |
| author | Rodgers, Allen L |
| author2 | Linder, Peter W |
| author_browse | Linder, Peter W Rodgers, Allen L |
| author_facet | Linder, Peter W Rodgers, Allen L |
| author_sort | Rodgers, Allen L |
| collection | Thesis |
| description | An ultra-high vacuum apparatus has been designed and constructed. Pressures of the order of 1 x 10⁻⁸ torr have been attained routinely. The adsorption of nitrogen by Pyrex has been investigated and the results obtained have shown good agreement with those in the literature. Rigorously cleaned evaporated films of sodium chloride have been prepared and the adsorption of nitrogen and argon by them has been investigated. Isosteric heats and entropies of adsorption have been determined and theoretical entropies calculated. The appearance of a group of sites of uniform activity, hitherto unavailable owing to contamination of the surface, is postulated. The adsorption of nitrogen and argon has been found to be reasonably well represented by the immobile, localized model with indications of the adsorbed argon molecules occupying a different set of sites from the adsorbed nitrogen. Two novel methods for the preparation of evaporated films of alkali halides are suggested. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/22174 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:56.645Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Chemistry |
| publisherStr | Department of Chemistry |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/22174 The adsorption of nitrogen and argon by evaporated films of sodium chloride Rodgers, Allen L Linder, Peter W Chemistry An ultra-high vacuum apparatus has been designed and constructed. Pressures of the order of 1 x 10⁻⁸ torr have been attained routinely. The adsorption of nitrogen by Pyrex has been investigated and the results obtained have shown good agreement with those in the literature. Rigorously cleaned evaporated films of sodium chloride have been prepared and the adsorption of nitrogen and argon by them has been investigated. Isosteric heats and entropies of adsorption have been determined and theoretical entropies calculated. The appearance of a group of sites of uniform activity, hitherto unavailable owing to contamination of the surface, is postulated. The adsorption of nitrogen and argon has been found to be reasonably well represented by the immobile, localized model with indications of the adsorbed argon molecules occupying a different set of sites from the adsorbed nitrogen. Two novel methods for the preparation of evaporated films of alkali halides are suggested. 2016-10-18T11:34:19Z 2016-10-18T11:34:19Z 1969 Master Thesis Masters MSc http://hdl.handle.net/11427/22174 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Rodgers, Allen L The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| thesis_degree_str | Master's |
| title | The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| title_full | The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| title_fullStr | The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| title_full_unstemmed | The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| title_short | The adsorption of nitrogen and argon by evaporated films of sodium chloride |
| title_sort | adsorption of nitrogen and argon by evaporated films of sodium chloride |
| topic | Chemistry |
| url | http://hdl.handle.net/11427/22174 |
| work_keys_str_mv | AT rodgersallenl theadsorptionofnitrogenandargonbyevaporatedfilmsofsodiumchloride AT rodgersallenl adsorptionofnitrogenandargonbyevaporatedfilmsofsodiumchloride |