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Question One: Calculate the diffusivity by following the below statement and requirements In a thin film technique used for pyrolysis process, and at Temperature of 500°C the thin-film allows unstable volatile products to diffuse through the reactive medium and escape to the gas-phase before they breakdown. To determine whether liquid-diffusion or pyrolysis chemistry is faster, the Damkohler Number (Da) is used to compare the ratio of diffusion resistance Taiffusion and reaction resistance Treaction time scale L = thin-film thickness = 3um = K = reaction rate =0.65-1 D = DA is the liquid-phase diffusivity calculated using the semi-empirical Wilke-Chang method. To calculate DA, composition-dependent properties, such as molar volume, viscosity and molecular weight are needed. 1. Assumes two cases by using the below data Case One ( Slower Diffusion) Case Two (Fast Diffusion) a levoglucosan solute in a water is diffusing through cellotriose solvent levoglucosan 2. Find their Molar Volume, Viscocisty and molecular weight. 3. Illustrate semi-empirical Wilke-Chang method 4. Perform the calculation for Da in both of the above cases 5. Suggest an alternative way to calculate the the ratio of diffusion resistance Tdiffusion and reaction resistance Treaction time scale. 6. Provide all the required references.

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