Liquid-vapor partitioning of HCl(aq) to 350°C

doi:10.1016/0016-7037(93)90462-6

Geochimica et Cosmochimica Acta

Volume 57, Issue 1, January 1993, Pages 1-7

https://doi.org/10.1016/0016-7037(93)90462-6 Get rights and content

Abstract

Partitioning of HCl(aq) between liquid and vapor phases was measured from 50–350°C at 50°C intervals by sampling the liquid and vapor phases in corrosion-resistant autoclaves. Values of the overall partitioning constant K were calculated from the observed compositions of the two phases using published activity coefficients for HCl(aq) in the liquid phase, assuming that the neutral HC1 molecule is the only solute species present in the vapor phase, and assigning a unit fugacity coefficient for vaporphase HC1. Partitioning is a strong function of temperature, with K increasing more than six orders of magnitude over the temperature range of this work. Measured values of K, including results available in the literature to 110°C, are well represented by a simple function of temperature T in Kelvin and solvent density ρ in g · cm⁻³: logK = −13.4944 − 934.466/T − 11.0029 logρ + 5.4847 logT.

The present measurements give directly the composition of the vapor phase over HCl(aq); partitioning of HC1 to the vapor phase over NaCl(aq) brines has been estimated through the use of approximate activity coefficients for HCl(aq) in the mixed brines.

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Geochimica et Cosmochimica Acta

Abstract

References (15)

The enthalpy of dilution of aqueous sodium chloride to 673 K. using a new heatflow and liquid-flow microcalorimeter. Excess thermodynamic properties and their pressure coefficients

J. Chem. Therm.

Isopiestic studies of aqueous solutions at elevated temperatures. IX. {(1 − y)NaCl + yLiCl}

J. Chem. Therm.

The enthalpy of dilution of HCl(aq) to 648 K and 40 MPa. Thermodynamic properties

J. Chem. Therm.

The dissociation constant and Henry's Law constant of HC1 in aqueous solution

Atmos. Environ.

Comments on “A new approach to measuring pH in brines and other concentrated electrolytes”

Electrical conductances and ionization constants of salts, acids, and bases in supercritical aqueous fluids: I. Hydrochloric acid from 100°–700°C and at pressures to 4000 bars

Amer. J. Sci.

Vapor pressure of aqueous hydrogen chloride solutions, 0–50°C

Ind. Eng. Chem.

Cited by (69)

Age, fluid inclusion, and H–O–S–Pb isotope geochemistry of the Baiyinchagan Sn–Ag–polymetallic deposit in the southern Great Xing'an Range, NE China

Chloride release characteristics of desulfurization wastewater droplet during evaporation process using the single droplet drying method

Formation and evolution of the Changbaishan volcanic geothermal system in a convergent plate boundary back-arc region constrained by boron isotope and gas data

Stable and radiogenic strontium isotope fractionation during hydrothermal seawater-basalt interaction

The Debye-Hückel theory and its importance in modeling electrolyte solutions

The solubility of crystalline cupric oxide in aqueous solution from 25 °C to 400 °C