Abstract

Abstract The usual approach utilising the Van't Hoff factor (or the mean ionic activity coefficient) cannot be applied to the thermodynamic equilibrium equation describing the growth of a molecular solution droplet formed in a water vapor atmosphere. A new semi‐empirical formula applicable to sustances which do not dissociate into ions in water is developed. As an example, the nucleus activity formulation for very hygroscopic organic nuclei ‐ such as dimethylsulfoxide ‐ is discussed. This substance is used for studying the possibility to disperse a dense fog of limited extent.

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