12. Calculate the specific adsorption of nonanol and construct an adsorption isotherm based on the dependence σ = f(c) of its aqueous solutions at T = 293 K.

s, mol/m3 σ*103, N/m c, mol/m3 σ*103, N/m c, mol/m3 σ*103, N/m
0 72.75 0.0251 68.40 0.0631 63.50
0.0100 71.40 0.0398 66.00 0.0794 62.30
0.0158 70.40 0.0500 64.70 0.1000 61.10

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