Accession Number : ADA190736

Title :   Anomalies in the Heat-Capacity Signatures of Submonolayer Adsorbates with Attractive Lateral Interactions.

Descriptive Note : Technical rept.,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s) : Kim, Young S ; Battaglia, Franco ; George, Thomas F

PDF Url : ADA190736

Report Date : Feb 1988

Pagination or Media Count : 40

Abstract : The analytic closed form of the heat-capacity signatures previously derived for the McQuistan-Hock (MQH) model of a lattice gas is applied to a various adsorbed systems for which the lateral interaction varies from a few meV to about 300 meV. It is shown that whenever the adsorption system can be described by a two-dimensional gas on which the substrate effects are less important than the adatom-adatom interactions, the computed temperatures at which the heat-capacity signatures display their maximum are in excellent agreement with the experimental measurements. Keywords: Heat capacities, Submonolayer adsorbates, Attractive lateral interactions, Anomalies, McQuistan hock model, Two dimensional lattice.

Descriptors :   *ADSORPTION, *HEAT, *TEMPERATURE, CAPACITY(QUANTITY), EXPERIMENTAL DATA, GASES, MEASUREMENT, SIGNATURES, SUBSTRATES, TWO DIMENSIONAL

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE