14. Based on the nitrogen adsorption isotherm, determine the specific surface of the adsorbent (T = 77 K, S0 = 16.2 10-20 m2):
p/ps……………………………………… 0.029 0.05 0.11 0.14 0.20
A, mol/kg……………………………… 2.16 2.39 2.86 3.02 3.33

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