Capillary condensation, which takes place in confined geometries, is the first-order vapor-to-
liquid phase transition and is explained by the Kelvin equation, but the equation's
applicability for arbitrarily curved surface has been long debated and is severe problem.
Recently, we have proposed generic dynamic equations for moving surfaces. Application of
the equations to the vapor/fluid interfaces in chemical equilibrium conditions nearly trivially
solves the generalization problem for the Kelvin equation. The equations are universally true …