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## Kelvin equation
Where: ## Additional recommended knowledge Equilibrium vapor pressure depends on droplet size.
If p, then liquid evaporates from the droplets.
If p , then the gas condenses onto the
droplets… and they grow.
As r increases, If we now cool the vapour, then T decreases, but so does p/p increases as the liquid is cooled. We can treat γ
and
V as approximately fixed, which means that the critical radius r
must also decrease.
The further you supercool a vapour, the smaller the critical radius
becomes. Ultimately it gets as small as a few molecules and the
liquid undergoes homogeneous nucleation and growth.
_{0}## See also## 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
Categories: Surface chemistry | Physical chemistry |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Kelvin_equation". A list of authors is available in Wikipedia. |