Calculate the specific adsorption using the Gibbs equation and plot the adsorption isotherm of substance A from the dependence of the surface tension of its aqueous solutions on the concentration at temperature T (Table 4). Determine the value of the limiting adsorption A∞ and the constant K in the Langmuir equation.
Option 4
Substance A Penten
s, mol/m3 0 2.5 5.15 7.13 11.0 14.20
σ*103, J/mol 72.75 69.00 67.90 66.60 63.00
T,K 293

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