28. Based on the benzene adsorption isotherm, determine the specific surface area of the adsorbent (T=293K, S0=49 10-20m2):
p/ps……………………………………… 0.05 0.12 0.19 0.26 0.34 0.44
a 102, mol/kg…………………………. 3.10 5.93 7.95 9.90 12.1 15.3

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