Gleichgewichtsradien von Dampfblasen und Flüssigkeitstropfen

The equations for equilibrium radii of vapour bubbles and liquid droplets are derived starting from the Thomson-Helmholtz-equation for the vapour pressure at curved interfaces, and the results are then compared with those from well-known equations of the technical literature. These equations usually make use of the vapour-pressure equations of a plane vapour-liquid interface. The differences in equilibrium radii of vapour bubbles proved to be negligible for high boiling temperatures, they become, however, important for low boiling temperatures. For liquid droplets the deviations are considerably higher and the use of the vapour pressure for a plane vapour-liquid interface is not correct.