Kelvin equation
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Kelvin equation describes the change of vapour pressure over liquid curved with a radius r (for example, in a capillary or over a droplet). The Kelvin equation is used for determination of pore size distribution of a porous medium using adsorption porosimetry.
where
p - actual vapour pressure
p0 - saturated vapour pressure
γ - surface tension
Vm - molar volume
R - universal gas constant
r - radius of the droplet
T - temperature
[edit] Links
[edit] References
W. T. Thomson, Phil. Mag. 42, 448 (1871)
S. J. Gregg and K. S. W. Sing, Adsorption, Surface Area and Porosity, 2nd edition,Academic Press, New York, (1982) p.121
Adamson and Gast, Physical Chemistry of Surfaces, 6th edition, (1997) p.54
