(Solved): 4) Two tanks are connected by a tube, 15 mm in diameter and 1.5 m long. One tank contains nitrogen-g ...

4) Two tanks are connected by a tube, 15 mm in diameter and 1.5 m long. One tank contains nitrogen-gnd one tank contains \( \mathrm{CO}_{2} \). The pressure and temperature are maintained at 350 kPa and \( 60^{\circ} \mathrm{C} \). The diffusivity is \( 0.09 \mathrm{~cm}^{2} / \mathrm{s} \). At some initial time, \( t=0 \), diffusion occurs between two tanks. After a while, the mole fraction of the nitrogen reache 0.6 on one end and 0.3 at the other end. Determine a) The rates and direction of mass transfer of \( \mathrm{CO}_{2} \) and nitrogen b) The velocities of each compound c) The molar average velocities of the mix ( 25 points)