There are two bulbs connected by a straight tube 0.001 m in diameter and 0.15 m in length. Initially the bulb at end '1' contains nitrogen and the bulb at '2' contains hydrogen. The pressure and temperature are maintained constant at 1 std. atm and 25C. At a certain time after allowing the diffusion to occur between the two bulbs, the nitrogen content of gas at end '1' of the tube is 80 mole % and at the other end is 25 mole%. If the diffusion coefficient is 0.784 cm /s, determine the rates and direction of transfer of hydrogen and nitrogen. (16) (Nov/Dec '05)