2. Calculate the excess adsorption of hexanol and construct an adsorption isotherm from the dependence σ = f (c) of its aqueous solutions at T = 293K.

s, mol/m3 0 0.100 0.200 0.398 0.631 1.260 2.510 3.980 6.31 10.00
σ 103, N/m 72.75 71.30 70.80 70.00 69.40 67.90 64.40 60.50 55.40 50.20

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