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Question-1. Hydrogen purification was conducted at 700 C using a 4-mm-thick palladium sheet having an area of 0.35 m? (10 points) (a) Calculate the diffusion coefficient of hydrogen in palladium at this temperature. The activation energy and preexponent are 11,500 J/mol and 72 x 10 m/s, respectively. R = 8,314 J/mol-K. (3 points) (b) When the steady-state condition was attained, hydrogen concentrations at the high- and low- pressures side of the plate were 1.5 and 0.7 kg/m. Compute the amount of hydrogen that passes through the sheet per hour (in kg/h). (7 points)