The Purification of hydrogen gas by diffusion through apalladium sheet was discussed. compute the number of kilograms ofhydrogen that pass per hour through a 6-mm- thick sheet of palladium having an area of 0.25 m^2 at 600 C(degree centigrade).assume a diffusion coffieient at the high and low pressure sides ofthe plate are 2.0 and 4.0 kg of hydrogen per cubic meter ofpalladium , and that stead state conditions have been attained.