Reconsider Prob. 14–56. Using the EES (or other) software, evaluate the effect of pipe wall thickness on the diffusion rate of hydrogen through the pipe wall. By varying the pipe wall thickness from 0.5 to 10 mm, plot the diffusion rate of hydrogen through the pipe wall as a function of wall thickness.

Data from problem 56

Pure hydrogen gas, at 25°C, is flowing through an iron pipe with an inner diameter of 25 mm. The iron pipe is 10 m long and has a wall thickness of 5 mm. If the concentration of hydrogen in the iron pipe at the inner surface is 0.1 kmol/m³ and negligible at the outer surface, determine the diffusion rate of hydrogen through the pipe wall, in kg/s.