Comment on Vapor Phase Homogeneous Nucleation of CH3CN and the Scaling Law for Onset Supersaturation Ratios
We point out that the scaling law for onset vapor phase nucleation, lnSonset ≈ 0.53 [Ω(Tc/T-1)]32, with Ω = 1.77 (from CH3CN surface tension data) predicts the temperature dependence and approximate magnitude of CH3CN supersaturation ratio data, S. This is contrary to the conclusions of Wright, Caldwell and El-Shall who estimate too large a value (2.14) for Ω. We note that Ω, the excess molecular surface entropy/k, is more reliably extracted from the temperature derivative of the surface tension data.
B. N. Hale and B. Kelly, "Comment on Vapor Phase Homogeneous Nucleation of CH3CN and the Scaling Law for Onset Supersaturation Ratios," Chemical Physics Letters, vol. 189, no. 1, pp. 100-102, Elsevier, Jan 1992.
The definitive version is available at http://dx.doi.org/10.1016/0009-2614(92)85160-C
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