Kelvin equation

The Kelvin equation is used to calculate the onset/occurrence of capillary condensation

$\ln \left({\frac {p}{p_{0}}}\right)=-{\frac {2\gamma _{lg}}{RT\rho _{l}H}}$

Where p is the pressure, Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle p_0} is the saturated vapour pressure, Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \gamma_{lg}} is the liquid-gas surface tension for the bulk fluid, Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \rho_l} is the density of the bulk fluid, R is the molar gas constant, T is the temperature and H is the pore or capillary width.