The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism

Rabindra N. Roy; Lakshmi N. Roy; Amy L. Ingle; William B. Davis; David W. Larkin; David A. Johnson; Eric J. Hnath; Frank J. Millero

doi:10.1016/S0021-9614(05)80160-0

The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism

Rabindra N. Roy, Lakshmi N. Roy, Amy L. Ingle, William B. Davis, David W. Larkin, David A. Johnson, Eric J. Hnath, Frank J. Millero

Ocean Sciences

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4 Scopus citations

Abstract

Electromotive-force measurements were made on the cell:Pt|H₂(g,p = 101.325 k Pa)|HBr(m_A), SrBr₂(m_B)|AgBr(s)|Ag(s). Activity coefficients of HBr in (hydrogen bromide + strontium bromide)(aq) were determined from electromotive-force measurements at temperatures ranging from 278.15 K to 318.15 K at 10 K intervals and at constant total ionic strengths of (0.1, 0.25, 0.5, 1.0, 2.0, and 3.0) mol · kg^-1. The results have been interpreted using Harned's empirical equations and also the comprehensive treatment of Pitzer. Activity coefficients for HBr in the salt mixture follow Harned's rule only at I = 0.1 mol · kg^-1. At higher ionic strengths, the eperimental results are best described by a non-linear equation. The Pitzer mixing parameters ^SΘ_H.Sr and Ψ_H.Sr.Br (including higher-order electrostatic effects) and Θ_H.Sr and Ψ_H.Sr.Br (excluding higher-order effects) as well as the temperature derivatives of the mixing coefficients have been determined and compared with the results for similar mixtures. The activity coefficients and excess enthalpies for HBr and SrBr₂ have also been calculated at the experimental temperatures and compared with the results of other investigators.

Original language	English (US)
Pages (from-to)	425-438
Number of pages	14
Journal	The Journal of Chemical Thermodynamics
Volume	24
Issue number	4
DOIs	https://doi.org/10.1016/S0021-9614(05)80160-0
State	Published - Apr 1992

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Physical and Theoretical Chemistry

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Roy, R. N., Roy, L. N., Ingle, A. L., Davis, W. B., Larkin, D. W., Johnson, D. A., Hnath, E. J., & Millero, F. J. (1992). The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism. The Journal of Chemical Thermodynamics, 24(4), 425-438. https://doi.org/10.1016/S0021-9614(05)80160-0

The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism. / Roy, Rabindra N.; Roy, Lakshmi N.; Ingle, Amy L.; Davis, William B.; Larkin, David W.; Johnson, David A.; Hnath, Eric J.; Millero, Frank J.

In: The Journal of Chemical Thermodynamics, Vol. 24, No. 4, 04.1992, p. 425-438.

Research output: Contribution to journal › Article

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title = "The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism",

abstract = "Electromotive-force measurements were made on the cell:Pt|H2(g,p = 101.325 k Pa)|HBr(mA), SrBr2(mB)|AgBr(s)|Ag(s). Activity coefficients of HBr in (hydrogen bromide + strontium bromide)(aq) were determined from electromotive-force measurements at temperatures ranging from 278.15 K to 318.15 K at 10 K intervals and at constant total ionic strengths of (0.1, 0.25, 0.5, 1.0, 2.0, and 3.0) mol · kg-1. The results have been interpreted using Harned's empirical equations and also the comprehensive treatment of Pitzer. Activity coefficients for HBr in the salt mixture follow Harned's rule only at I = 0.1 mol · kg-1. At higher ionic strengths, the eperimental results are best described by a non-linear equation. The Pitzer mixing parameters SΘH.Sr and ΨH.Sr.Br (including higher-order electrostatic effects) and ΘH.Sr and ΨH.Sr.Br (excluding higher-order effects) as well as the temperature derivatives of the mixing coefficients have been determined and compared with the results for similar mixtures. The activity coefficients and excess enthalpies for HBr and SrBr2 have also been calculated at the experimental temperatures and compared with the results of other investigators.",

author = "Roy, {Rabindra N.} and Roy, {Lakshmi N.} and Ingle, {Amy L.} and Davis, {William B.} and Larkin, {David W.} and Johnson, {David A.} and Hnath, {Eric J.} and Millero, {Frank J.}",

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T1 - The study of activity coefficients of (hydrogen bromide + strontium bromide) (aq) using Pitzer's formalism

AU - Roy, Rabindra N.

AU - Roy, Lakshmi N.

AU - Ingle, Amy L.

AU - Davis, William B.

AU - Larkin, David W.

AU - Johnson, David A.

AU - Hnath, Eric J.

AU - Millero, Frank J.

PY - 1992/4

Y1 - 1992/4

N2 - Electromotive-force measurements were made on the cell:Pt|H2(g,p = 101.325 k Pa)|HBr(mA), SrBr2(mB)|AgBr(s)|Ag(s). Activity coefficients of HBr in (hydrogen bromide + strontium bromide)(aq) were determined from electromotive-force measurements at temperatures ranging from 278.15 K to 318.15 K at 10 K intervals and at constant total ionic strengths of (0.1, 0.25, 0.5, 1.0, 2.0, and 3.0) mol · kg-1. The results have been interpreted using Harned's empirical equations and also the comprehensive treatment of Pitzer. Activity coefficients for HBr in the salt mixture follow Harned's rule only at I = 0.1 mol · kg-1. At higher ionic strengths, the eperimental results are best described by a non-linear equation. The Pitzer mixing parameters SΘH.Sr and ΨH.Sr.Br (including higher-order electrostatic effects) and ΘH.Sr and ΨH.Sr.Br (excluding higher-order effects) as well as the temperature derivatives of the mixing coefficients have been determined and compared with the results for similar mixtures. The activity coefficients and excess enthalpies for HBr and SrBr2 have also been calculated at the experimental temperatures and compared with the results of other investigators.

AB - Electromotive-force measurements were made on the cell:Pt|H2(g,p = 101.325 k Pa)|HBr(mA), SrBr2(mB)|AgBr(s)|Ag(s). Activity coefficients of HBr in (hydrogen bromide + strontium bromide)(aq) were determined from electromotive-force measurements at temperatures ranging from 278.15 K to 318.15 K at 10 K intervals and at constant total ionic strengths of (0.1, 0.25, 0.5, 1.0, 2.0, and 3.0) mol · kg-1. The results have been interpreted using Harned's empirical equations and also the comprehensive treatment of Pitzer. Activity coefficients for HBr in the salt mixture follow Harned's rule only at I = 0.1 mol · kg-1. At higher ionic strengths, the eperimental results are best described by a non-linear equation. The Pitzer mixing parameters SΘH.Sr and ΨH.Sr.Br (including higher-order electrostatic effects) and ΘH.Sr and ΨH.Sr.Br (excluding higher-order effects) as well as the temperature derivatives of the mixing coefficients have been determined and compared with the results for similar mixtures. The activity coefficients and excess enthalpies for HBr and SrBr2 have also been calculated at the experimental temperatures and compared with the results of other investigators.

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