Thermodynamic measurements of adsorption of Xe and CO on NaCl(100)

Adsorption isotherms for Xe and CO on NaCl(100) have been measured at low temperatures under UHV conditions using XPS to monitor coverage. The enthalpy of adsorption for Xe at θ = 0.5 was found to be ΔH (1) = 18.0 ± 0.5 kj mol −1 and for CO we obtained ΔH (1) = 14 ± 1 kJ mol −1. The entropy differen...

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Bibliographic Details
Published in:Surface science 1985-01, Vol.159 (2), p.L474-L482
Main Authors: Hardy, J.P., Ewing, G.E., Stables, R., Simpson, C.J.S.M.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
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Summary:Adsorption isotherms for Xe and CO on NaCl(100) have been measured at low temperatures under UHV conditions using XPS to monitor coverage. The enthalpy of adsorption for Xe at θ = 0.5 was found to be ΔH (1) = 18.0 ± 0.5 kj mol −1 and for CO we obtained ΔH (1) = 14 ± 1 kJ mol −1. The entropy differences between Xe or CO on NaCl(100) and Xe or CO in the pure solid were nearly zero. These thermodynamic data are discussed qualitatively in terms of theoretical models for adsorption.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(85)90427-3