Comment on 'Generalized Kelvin equation and the water content of a cloud'

摘要

Kuz [Phys. Rev. E. 51, 5136 (1995)] presents the novel Kelvin equation, which would reduce to ordinary forms if some assumptions were made regarding the ratio of the number of molecules in the gas to that in the liquid phase. We feel that the definition used for the Gibbs free energy as a starting point of calculations is not a proper one and, in addition, it is not correctly treated. We present practical situations contradicting the conclusion concerning the liquid-water content in clouds. Some minor inaccuracies are also highlighted.