3.25 The table shows the results of studying the adsorption of ethane on zeolite at T = 298 K.
Р*10-4, Pa 0.75 1.00 1.50 2.00 2.50 3.00
a, mol/kg 2.31 2.37 2.53 2.83 3.21 3.77
Determine the total porosity of the zeolite using the Dubinin-Radushkevich method. The saturated vapor pressure of ethane at this temperature is Рs=3.7*104 Pa, the molar volume of ethane is Vm=6.4*10-5 m3/mol.

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