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Estimate the value of the apparent contact angles (q*) for a composite interface formed by Water...
Estimate the value of the apparent contact angles (q*) for a
composite interface formed by Water on an electrospun surface of
PMMA + 44.1 wt% POSS.
The average fiber radius (R) = 500 nm and the average inter-fiber
spacing (D) = 4.5 µm. The Young’s contact angle (q) for water on a
spin-coated PMMA + 44.1 wt% POSS surface = 123°.
Also, compute the values of the two design parameters D* and A*.
Note the capillary length (L cap) for water = 2.8 mm. Based on the
value of A*, estimate the breakthrough pressure for water on this
electrospun surface. Also, estimate the height of a column of water
that would provide this breakthrough pressure.
Solutions
Amanda K answered 5 months agoRelated Solutions
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Light is incident upon air-water interface (n=1.33). Calculate
the Brewster and critical angles for both internal and external
reflections. In each case, distinguish between polarization modes.
Calculate the reflectance and transmittance of water (as seen from
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Q.26 Estimate the value of the equilibrium constant at 620 K for each of the following...
Q.26
Estimate the value of the equilibrium constant at 620 K for each
of the following reactions. ΔG∘f for BrCl(g) is −1.0
kJ/mol. The standard molar entropy, S∘, for BrCl(g) is
240.0 J/mol⋅K.
Part A
2NO2(g)⇌N2O4(g). ΔH∘f for N2O4(g) is 9.16 kJ/mol.
Express your answer using three significant figures.
K =
Part B
Br2(g)+Cl2(g)⇌2BrCl(g) .ΔH∘f for BrCl(g) is 14.6
kJ/mol.
Express your answer using three significant figures.
K =
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