Based on the results of measuring the surface tension of solutions of n-octyl alcohol in water at 25.0 ° C depending on the concentration (table below), find the limiting adsorption of alcohol G∞ using a graphical method, and calculate the area occupied by 1 molecule of alcohol in a saturated adsorption layer.
C, mmol/L 0.1 0.12 0.19 0.24 0.38 0.48 0.77 0.96 1.54 1.92 3.08
σ, mN/m 71.0 70.3 68.1 66.7 61.5 60.6 54.0 52.0 45.7 40.8 33.8

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