Potential degassing of hydrogen chloride from acidified sodium chloride droplets

S. L. Clegg; P. Brimblecombe

doi:10.1016/0004-6981(85)90167-2

Potential degassing of hydrogen chloride from acidified sodium chloride droplets

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 22_Publication in policy or professional journal

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Author(s)

S. L. Clegg
P. Brimblecombe

Detail(s)

Original language	English
Pages (from-to)	465-470
Journal / Publication	Atmospheric Environment (1967)
Volume	19
Issue number	3
Publication status	Published - 1985
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/0004-6981(85)90167-2 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-0021812061&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(d6da58de-25e0-440e-a33d-28b4886d18c7).html

Abstract

The equilibrium constant for the reaction: HCl_g = H_aq ⁺ + Cl_aq ^- is calculated from partial pressure data for a range of temperatures. It is found to vary between 3.9 × 10⁷ and 1.84 × 10⁶ mol² kg^-2 atm^-1 from 0 to 25°C. A closed box aerosol droplet model is developed to simulate the potential degassing of HC1, taking into account thermodynamic and droplet radius effects. Equilibrium degassing of HC1 is calculated and found to be very high, greater than 90 % of the initial hydrogen ion concentration for relative humidities less than about 98 %. Hydrogen chloride loss increases with decreasing droplet radius, but this effect is only important at relative humidities close to 100 %. The results are found to be rather insensitive to errors in the calculated mean activity coefficient of HC1. © 1985.