What Can Really Be Deduced from Enthalpy of Immersional Wetting Experiments?

✍ Scribed by J.M. Douillard

• Book ID: 102575541
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 77 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0468

✦ Synopsis

NOTE

What Can Really Be Deduced from Enthalpy of Immersional Wetting Experiments? surface area (A) is the specific surface area of the solid (A sp ), which is supposed to be invariable during the process. This is a heuristic approxima-

The determination of the thickness of the solid/liquid interface tion. We start with a general expression of the internal energy U, by immersional wetting calorimetry is not consistent with the thermodynamic equations describing this technique. In fact, the im-

mersional wetting equation is simply another form of the famous Young equation. Consequently, this technique does not provide

where S is the entropy, V the volume, g the surface tension, T the temperamore information than contact angle experiments. This is a comture, and p the pressure.

parison of the two techniques which allows the comparison of

We will assume the following equality, given that the pV terms are enthalpic and entropic forces acting inside interfaces. ᭧ 1996