Thermal diffusion of weak electrolytes. I. A model for the determination of the soret coefficient of weak electrolytes

L. Domonkos, J. Liszi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A new model is developed for determination of the Soret coefficient and the enthalpy of transport for weak (pk ∼ 4-5) 1:1 electrolytes in aqueous solutions. As an example the model is applied for acetic acid-water system. In the model the effects both of the thermal diffusion and the displacement of the dissociation equilibrium with temperature and concentration are taken into account. The Soret coefficient is calculated from the enthalpies of transport of the anion which was taken identical to that of the molecular acid. The calculated Soret coefficient of the acetic acid (ionic and molecular form together) exhibits a maximum value of 8.3 · 10-3 K-1 at the molality of 0.025 mol kg-1.

Original languageEnglish
Pages (from-to)57-67
Number of pages11
JournalZeitschrift fur Physikalische Chemie
Volume205
Issue number1
Publication statusPublished - 1998

Fingerprint

Soret coefficient
Thermal diffusion
thermal diffusion
Electrolytes
electrolytes
acetic acid
Acetic Acid
Enthalpy
enthalpy
Anions
dissociation
anions
aqueous solutions
acids
Acids
Water
water
Temperature
temperature

Keywords

  • Acetic acid
  • Dissociation equilibrium
  • Enthalpy of transport
  • Soret coefficient
  • Weak electrolyte

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

@article{46eec7f2e8b241ec93d1d61381885068,
title = "Thermal diffusion of weak electrolytes. I. A model for the determination of the soret coefficient of weak electrolytes",
abstract = "A new model is developed for determination of the Soret coefficient and the enthalpy of transport for weak (pk ∼ 4-5) 1:1 electrolytes in aqueous solutions. As an example the model is applied for acetic acid-water system. In the model the effects both of the thermal diffusion and the displacement of the dissociation equilibrium with temperature and concentration are taken into account. The Soret coefficient is calculated from the enthalpies of transport of the anion which was taken identical to that of the molecular acid. The calculated Soret coefficient of the acetic acid (ionic and molecular form together) exhibits a maximum value of 8.3 · 10-3 K-1 at the molality of 0.025 mol kg-1.",
keywords = "Acetic acid, Dissociation equilibrium, Enthalpy of transport, Soret coefficient, Weak electrolyte",
author = "L. Domonkos and J. Liszi",
year = "1998",
language = "English",
volume = "205",
pages = "57--67",
journal = "Zeitschrift fur Physikalische Chemie",
issn = "0942-9352",
publisher = "Oldenbourg Wissenschaftsverlag GmbH",
number = "1",

}

TY - JOUR

T1 - Thermal diffusion of weak electrolytes. I. A model for the determination of the soret coefficient of weak electrolytes

AU - Domonkos, L.

AU - Liszi, J.

PY - 1998

Y1 - 1998

N2 - A new model is developed for determination of the Soret coefficient and the enthalpy of transport for weak (pk ∼ 4-5) 1:1 electrolytes in aqueous solutions. As an example the model is applied for acetic acid-water system. In the model the effects both of the thermal diffusion and the displacement of the dissociation equilibrium with temperature and concentration are taken into account. The Soret coefficient is calculated from the enthalpies of transport of the anion which was taken identical to that of the molecular acid. The calculated Soret coefficient of the acetic acid (ionic and molecular form together) exhibits a maximum value of 8.3 · 10-3 K-1 at the molality of 0.025 mol kg-1.

AB - A new model is developed for determination of the Soret coefficient and the enthalpy of transport for weak (pk ∼ 4-5) 1:1 electrolytes in aqueous solutions. As an example the model is applied for acetic acid-water system. In the model the effects both of the thermal diffusion and the displacement of the dissociation equilibrium with temperature and concentration are taken into account. The Soret coefficient is calculated from the enthalpies of transport of the anion which was taken identical to that of the molecular acid. The calculated Soret coefficient of the acetic acid (ionic and molecular form together) exhibits a maximum value of 8.3 · 10-3 K-1 at the molality of 0.025 mol kg-1.

KW - Acetic acid

KW - Dissociation equilibrium

KW - Enthalpy of transport

KW - Soret coefficient

KW - Weak electrolyte

UR - http://www.scopus.com/inward/record.url?scp=0042345541&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042345541&partnerID=8YFLogxK

M3 - Article

VL - 205

SP - 57

EP - 67

JO - Zeitschrift fur Physikalische Chemie

JF - Zeitschrift fur Physikalische Chemie

SN - 0942-9352

IS - 1

ER -