Liquid-vapor partitioning of HCl(aq) to 350[degrees]C

Journal Article · Thu Dec 31 23:00:00 EST 1992 · Geochimica et Cosmochimica Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(93)90462-6· OSTI ID:6923925

Simonson, J M; Palmer, D A ^[1]

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1. Oak Ridge National Lab., TN (United States)

Partitioning of HCl(aq) between liquid and vapor phases was measured from 50-350[degrees]C at 50[degrees]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 HCl molecule is the only solute species present in the vapor phase, and assigning a unit fugacity coefficient for vapor-phase HCl. 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[degrees]C, are well represented by a simple function of temperature T in Kelvin and solvent density [rho] in g[center dot]cm[sup [minus]3]: log K = [minus]13.4944 [minus] 934.466/T [minus] 11.0029 log [rho] + 5.4847 log T. The present measurements give directly the composition of the vapor phase over HCl(aq); partitioning of HCl 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. 15 refs., 2 figs., 4 tabs.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6923925
• Journal Information: Geochimica et Cosmochimica Acta; (United States), Journal Name: Geochimica et Cosmochimica Acta; (United States) Vol. 57:1; ISSN GCACAK; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
BRINES
CHLORIDES
CHLORINE COMPOUNDS
DATA
EXPERIMENTAL DATA
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LIQUIDS
NUMERICAL DATA
PARTITION
PHYSICAL PROPERTIES
REACTIVITY COEFFICIENTS
SODIUM CHLORIDES
SODIUM COMPOUNDS
TEMPERATURE COEFFICIENT
TEMPERATURE DEPENDENCE
VAPORS