Wetting and Adsorption Thermodynamics

Free energy values are most suitable for describing the wettability of a solid by a liquid. Actually, the initial spreading coefficient. 

For nonspreading systems, the final spreading coefficient is related to the equilibrium contact angle by the equation 

Solid References Water n-butyl chloride n-heptane  

Spreading Pressure Values, v ,, for the Adsorption of Vapors on Analaae and Graphite  

If the surface area S of a solid is known, the heat of immersion can be put on unit area basis and 

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