Thermodynamic properties of aqueous mixtures of HCl and CoCl2 at different temperatures. Application of Pitzer's formalism

Rabindra N. Roy; C. Porter Moore; Monica N. White; Lakshmi N. Roy; Kathleen M. Vogel; David A. Johnson; Frank J. Millero

doi:10.1021/j100180a075

Thermodynamic properties of aqueous mixtures of HCl and CoCl₂ at different temperatures. Application of Pitzer's formalism

Rabindra N. Roy, C. Porter Moore, Monica N. White, Lakshmi N. Roy, Kathleen M. Vogel, David A. Johnson, Frank J. Millero

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Emf measurements were made on the cell without liquid junction: Pt;H₂(g,1 atm)|HCl(m₁),CoCl₂(m₂)|AgCl,Ag (A). Activity coefficients of HCl and CoCl₂ for the system H⁺-Co²⁺-Cl^--H₂O have been investigated at temperatures ranging from 278.15 to 318.15 K at 10 K intervals and at constant total ionic strengths from 0.1 to 4.0 mol kg^-1. The results have been interpreted using Harned's empirical equations and the comprehensive treatment of Pitzer, including the contributions of higher order electrostatic terms. The Pitzer mixing parameters ^Sθ_H,Co and ψ_H,Co,Cl as well as the temperature derivatives of the mixing coefficients have been well represented by linear equations. These results may be used to calculate the relative apparent molal enthalpy for H⁺, Co²⁺, and Cl^- aqueous solutions. The activity coefficients and excess enthalpies for HCl and CoCl₂ are reported at 298.15 K.

Original language	English (US)
Pages (from-to)	403-407
Number of pages	5
Journal	Journal of physical chemistry
Volume	96
Issue number	1
DOIs	https://doi.org/10.1021/j100180a075
State	Published - 1992
Externally published	Yes

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Engineering(all)
Physical and Theoretical Chemistry

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@article{2c8d69d533cc40dd8bab455811a92bb1,

title = "Thermodynamic properties of aqueous mixtures of HCl and CoCl2 at different temperatures. Application of Pitzer's formalism",

abstract = "Emf measurements were made on the cell without liquid junction: Pt;H2(g,1 atm)|HCl(m1),CoCl2(m2)|AgCl,Ag (A). Activity coefficients of HCl and CoCl2 for the system H+-Co2+-Cl--H2O have been investigated at temperatures ranging from 278.15 to 318.15 K at 10 K intervals and at constant total ionic strengths from 0.1 to 4.0 mol kg-1. The results have been interpreted using Harned's empirical equations and the comprehensive treatment of Pitzer, including the contributions of higher order electrostatic terms. The Pitzer mixing parameters SθH,Co and ψH,Co,Cl as well as the temperature derivatives of the mixing coefficients have been well represented by linear equations. These results may be used to calculate the relative apparent molal enthalpy for H+, Co2+, and Cl- aqueous solutions. The activity coefficients and excess enthalpies for HCl and CoCl2 are reported at 298.15 K.",

author = "Roy, {Rabindra N.} and Moore, {C. Porter} and White, {Monica N.} and Roy, {Lakshmi N.} and Vogel, {Kathleen M.} and Johnson, {David A.} and Millero, {Frank J.}",

year = "1992",

doi = "10.1021/j100180a075",

language = "English (US)",

volume = "96",

pages = "403--407",

journal = "Journal of physical chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "1",

}

TY - JOUR

T1 - Thermodynamic properties of aqueous mixtures of HCl and CoCl2 at different temperatures. Application of Pitzer's formalism

AU - Roy, Rabindra N.

AU - Moore, C. Porter

AU - White, Monica N.

AU - Roy, Lakshmi N.

AU - Vogel, Kathleen M.

AU - Johnson, David A.

AU - Millero, Frank J.

PY - 1992

Y1 - 1992

N2 - Emf measurements were made on the cell without liquid junction: Pt;H2(g,1 atm)|HCl(m1),CoCl2(m2)|AgCl,Ag (A). Activity coefficients of HCl and CoCl2 for the system H+-Co2+-Cl--H2O have been investigated at temperatures ranging from 278.15 to 318.15 K at 10 K intervals and at constant total ionic strengths from 0.1 to 4.0 mol kg-1. The results have been interpreted using Harned's empirical equations and the comprehensive treatment of Pitzer, including the contributions of higher order electrostatic terms. The Pitzer mixing parameters SθH,Co and ψH,Co,Cl as well as the temperature derivatives of the mixing coefficients have been well represented by linear equations. These results may be used to calculate the relative apparent molal enthalpy for H+, Co2+, and Cl- aqueous solutions. The activity coefficients and excess enthalpies for HCl and CoCl2 are reported at 298.15 K.

AB - Emf measurements were made on the cell without liquid junction: Pt;H2(g,1 atm)|HCl(m1),CoCl2(m2)|AgCl,Ag (A). Activity coefficients of HCl and CoCl2 for the system H+-Co2+-Cl--H2O have been investigated at temperatures ranging from 278.15 to 318.15 K at 10 K intervals and at constant total ionic strengths from 0.1 to 4.0 mol kg-1. The results have been interpreted using Harned's empirical equations and the comprehensive treatment of Pitzer, including the contributions of higher order electrostatic terms. The Pitzer mixing parameters SθH,Co and ψH,Co,Cl as well as the temperature derivatives of the mixing coefficients have been well represented by linear equations. These results may be used to calculate the relative apparent molal enthalpy for H+, Co2+, and Cl- aqueous solutions. The activity coefficients and excess enthalpies for HCl and CoCl2 are reported at 298.15 K.

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DO - 10.1021/j100180a075

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SP - 403

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JO - Journal of physical chemistry

JF - Journal of physical chemistry

IS - 1

ER -

Thermodynamic properties of aqueous mixtures of HCl and CoCl₂ at different temperatures. Application of Pitzer's formalism

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