Computer Science
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57....1s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 1, pp.1-7
Computer Science
6
Scientific paper
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 in g · cm -3 : log K = -13.4944 - 934.466/ T - 11.0029 log + 5.4847 log T . 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.
Palmer Donald A.
Simonson John M.
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