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Unformatted text preview: e interfacial tension between the water and the oil?
The silicone is highly viscous, so assume it behaves like a solid. For water, γlv=72.5 mJ/m2 Water
Silicone oil film, γsv=20 mJ/m2 ( ) 4. The pressure inside an air bubble in water is ___________(less than, equal to, or greater than)
the hydrostatic pressure inside a droplet of water in air when both have the same diameter.
Why? Less than; because the critical radius is measured from the water to the vapor, which would be . negative in this case. This results in a reduced saturation pressure according to See also the Laplace equation.
5. The surface tensions of solutions of sodium dodecyl sulfate (SDS) in 0.1 NaCl at 20°C are:
SDS (mM) 2.0
γ (mJ/m2) 37.90
The surface tension of a 0.1 NaCl solu...
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This document was uploaded on 03/19/2014 for the course EMA 4121 at University of Florida.
- Spring '11
- EMA4121, Interfacial Engineering, UF, MSE