15. Based on the nitrogen adsorption isotherm, determine the specific surface area of the adsorbent (T=77K, S0=16.2 10-20m2):
p/ps……………………………………… 0.02 0.04 0.08 0.14 0.16 0.18
a, mol/kg……………………………… 1.86 2.31 2.72 3.07 3.12 3.23

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