Thermodynamic formulation of adsorption phenomena at the solid/solution interface: A practical approach

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Abstract

A thermodynamic treatment of solid/solution interfacial phenomena is presented with particular attention to formulas which are operational for the analysis of experimental data. The thermodynamic potential functions (enthalpy, free enthalpy and entropy) of immersion and displacement are divided into bulk and interfacial contributions. The enthalpies of immersion and displacement are obtained from calorimetry. From a knowledge of the adsorption excess isotherm, the free enthalpy of immersion (and displacement) can be deduced from the Gibbs adsorption equation. Hence the entropy of immersion and displacement can also be calculated. The bulk contribution is obtained from a combination of the adsorption excess isotherm with solution thermodynamic data. Subtraction of the bulk dilution quantities from the corresponding immersion (displacement) quantities gives access to the enthalpy, free enthalpy and entropy of formation of the adsorbed phase.

Original languageEnglish
Pages (from-to)287-292
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume71
Issue number3
DOIs
Publication statusPublished - Jun 9 1993

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Enthalpy
Solid solutions
solid solutions
submerging
enthalpy
Thermodynamics
formulations
Adsorption
thermodynamics
adsorption
Entropy
entropy
Adsorption isotherms
isotherms
Gibbs adsorption equation
Calorimetry
subtraction
Dilution
dilution
heat measurement

Keywords

  • Adsorption
  • solid/liquid interface
  • thermodynamic formulation.

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

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abstract = "A thermodynamic treatment of solid/solution interfacial phenomena is presented with particular attention to formulas which are operational for the analysis of experimental data. The thermodynamic potential functions (enthalpy, free enthalpy and entropy) of immersion and displacement are divided into bulk and interfacial contributions. The enthalpies of immersion and displacement are obtained from calorimetry. From a knowledge of the adsorption excess isotherm, the free enthalpy of immersion (and displacement) can be deduced from the Gibbs adsorption equation. Hence the entropy of immersion and displacement can also be calculated. The bulk contribution is obtained from a combination of the adsorption excess isotherm with solution thermodynamic data. Subtraction of the bulk dilution quantities from the corresponding immersion (displacement) quantities gives access to the enthalpy, free enthalpy and entropy of formation of the adsorbed phase.",
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T1 - Thermodynamic formulation of adsorption phenomena at the solid/solution interface

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AU - Király, Z.

AU - Dékány, I.

AU - Nagy, L.

PY - 1993/6/9

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N2 - A thermodynamic treatment of solid/solution interfacial phenomena is presented with particular attention to formulas which are operational for the analysis of experimental data. The thermodynamic potential functions (enthalpy, free enthalpy and entropy) of immersion and displacement are divided into bulk and interfacial contributions. The enthalpies of immersion and displacement are obtained from calorimetry. From a knowledge of the adsorption excess isotherm, the free enthalpy of immersion (and displacement) can be deduced from the Gibbs adsorption equation. Hence the entropy of immersion and displacement can also be calculated. The bulk contribution is obtained from a combination of the adsorption excess isotherm with solution thermodynamic data. Subtraction of the bulk dilution quantities from the corresponding immersion (displacement) quantities gives access to the enthalpy, free enthalpy and entropy of formation of the adsorbed phase.

AB - A thermodynamic treatment of solid/solution interfacial phenomena is presented with particular attention to formulas which are operational for the analysis of experimental data. The thermodynamic potential functions (enthalpy, free enthalpy and entropy) of immersion and displacement are divided into bulk and interfacial contributions. The enthalpies of immersion and displacement are obtained from calorimetry. From a knowledge of the adsorption excess isotherm, the free enthalpy of immersion (and displacement) can be deduced from the Gibbs adsorption equation. Hence the entropy of immersion and displacement can also be calculated. The bulk contribution is obtained from a combination of the adsorption excess isotherm with solution thermodynamic data. Subtraction of the bulk dilution quantities from the corresponding immersion (displacement) quantities gives access to the enthalpy, free enthalpy and entropy of formation of the adsorbed phase.

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