Condensation of a supersaturated vapor. II. The homogeneous nucleation of the n-alkyl benzenes

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Abstract
The design of an improved version of the upward thermal diffusion cloud chamber is described. Such a chamber was constructed and used to measure the supersaturations required to observe a rate of homogeneous nucleation of 2−3 drops cm−3⋅sec−1. Measurements were made on benzene, toluene, ortho−xylene, and n−butylbenzene over as much as a 150°C range of temperatures. The results obtained are compared to the predictions of the classical theory of homogeneous nucleation (Volmer−Becker−Döring−Zeldovich) and of the Lothe−Pound theory. The classical theory is found to be in excellent agreement with the experimental results.

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