catalysts

b) Figure Q4.2 shows the N2 adsorption BET plots for 50 mg of catalyst B measured at 77 K. Using this information and the data provided in Table Q4.1., calculate: (1) The monolayer volume of N2 adsorbed. (2 marks) (ii) The surface area of the material. (3 marks) The specific surface area (surface area per unit of mass). (1 mark) Icontinued TABLE Q4.1. Parameter Molar volume ideal gas Avogadro's number Area of N2 molecule C constant (related to the enthalpies of adsorption and condensation) Value and units 22.414 L 6.022x1023 1.62x10-19 m2 152.7 20 15 y = 106.2x + 0.7 R' = 1.0 P/(V(P.-P)) (L-1) 0 0 0.2 0.05 0.1 0.15 P/P. FIGURE Q4.2