2. Based on experimental data on the sorption of water vapor on coal (at 293 K), construct a capillary condensation curve (hysteresis loop). Using the desorption branch, construct the integral and differential pore size distribution curves.
Equilibrium pressure р*10-2, Pa 4.7 9.3 14.0 18.7 20.9 23.3
Value A, mol/kg adsorption 0.5 1.5 3.5 20.0 24.0 28.5
desorption 0.5 1.5 13.0 27.0 28.0 28.5
Saturated vapor pressure of water ps=2338 Pa. The molar volume of water is 18 cm3/mol, the surface tension of water is b=71.96*10-3 J/m2.
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