Problem 2: 10 points (Problem 14 in the textbook, page 134) Consider the cracking of cumene C9H12 in the presence of silica-alumina catalyst particles at 1 atm and 510C. Use the following data to calculate the effective diffusivity, and determine the dominant mode of diffusion: Particle diameter =0.43cm=d Specific surface area =342m2/g=Sgg Particle density =1.14g/cm3=5 Porosity =0.51=p Tortuosity factor =3=P Molecular diffusivity =0.15cm2/s=DAE