Calculate the excess adsorption of 1,3-butanediol and construct an adsorption isotherm from the dependence σ = f(c) of its aqueous solutions at T=303K.
N 10 0.065 0.144 0.224 0.337 0.395 0.536 0.610 0.822 0.978 1.242 1.655
σ 103, N/m 71.15 64.27 60.10 57.85 54.56 52.87 50.91 49.79 48.49 47.04 45.51 43.94

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