Problem 5 A thin wall capillary is filled with pure gas at an absolute pressure of 5atm. The gas penetrates the wall of the capillary and it is rapidly diluted in the ambient medium which is essentially free of this gas. How long is required for 90% of the gas to leak from the capillary? Data R=625m Inside diameter =1250m. Wall thickness =20m. T=27C R=8.314 Joule /Kmol Permeability coeff: P=1015mol/m.s.Pa