Abstract
We use quantum mechanical evaluations of the Gibbs free energy of the hydrates of sulfuric acid, H2SO4. nH2O and (H2SO4)2
. nH2O to evaluate an empirical surface tension for sulfuric acid-water clusters containing few molecules.
We use this surface tension to evaluate nucleation rates using classical heteromolecular theory. At low temperatures
(T 213 K) the nucleation rates obtained with the empirical surface tensions are signifi cantly greater than those
using bulk values of the surface tension. At higher temperatures the difference disappears.
. nH2O to evaluate an empirical surface tension for sulfuric acid-water clusters containing few molecules.
We use this surface tension to evaluate nucleation rates using classical heteromolecular theory. At low temperatures
(T 213 K) the nucleation rates obtained with the empirical surface tensions are signifi cantly greater than those
using bulk values of the surface tension. At higher temperatures the difference disappears.
Keywords
nucleation;Gibbs energy;aerosol microphysics
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DOI: https://doi.org/10.4401/ag-3406
Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X