Comment on vapor phase homogeneous nucleation of CH 3 CN and the scaling law for onset supersaturation ratios

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Chemical Physics Letters, ISSN: 0009-2614, Vol: 189, Issue: 1, Page: 100-102

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Citations 10
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Hale, Barbara N.; Kelly, Brendan
Elsevier BV; Elsevier
Physics and Astronomy; Chemistry; Physics
article description
We point out that the scaling law for onset vapor phase nucleation, ln S onset ≈ 0.53 [Ω( T c / T −1)] 32, with Ω = 1.77 (from CH 3 CN surface tension data) predicts the temperature dependence and approximate magnitude of CH 3 CN 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.