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Adsorción física sobre sólidos: aspectos termodinámicos Physical adsorption on solids: thermodynamic aspects
- Source :
- Química Nova, Vol 32, Iss 5, Pp 1350-1355 (2009)
- Publication Year :
- 2009
- Publisher :
- Sociedade Brasileira de Química, 2009.
-
Abstract
- A thermodynamic formalism based on the Gibbs Dividing Surface (GDS) for the description of a solid-fluid interface is presented, so that the adsorption layer is understand as a phase and the adsorption process as the transference of components between a 3-dimensional phase and a 2-dimensional one. Using a state equation derived from the Henry's Law, we shall show how the Langmuir isotherm is deduced from de Gibbs isotherm. The GDS is useful also for understanding the release of heat by a system as the adsorption occurs.
- Subjects :
- physical adsorption
Gibbs isotherm
isosteric enthalpy
Chemistry
QD1-999
Subjects
Details
- Language :
- English, Spanish; Castilian, Portuguese
- ISSN :
- 01004042 and 16787064
- Volume :
- 32
- Issue :
- 5
- Database :
- Directory of Open Access Journals
- Journal :
- Química Nova
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.bf218c5b126d4ba29199d895f81cbad7
- Document Type :
- article
- Full Text :
- https://doi.org/10.1590/S0100-40422009000500046