Modified Form of Kohler Theory for a Soluble Trace Gas

1 Modified Form of Kohler Theory for a Soluble Trace Gas 

Let us consider how droplet activation changes when a soluble trace gas is present (Laaksonen et al. 1998). We can first rewrite (17.A.1) as 

When a soluble gas is present, an equation analogous to (17.A.6) governs the gas equilibrium 

To approximate the right-hand side (RHS) of (17.A.7), the activity coefficient of a completely dissociated gas is given by 

The partial pressure of the soluble gas can be expressed in terms of its molar concentration, Na (moles per volume of air) by 

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