Question

Two bulbs are connected by a tube, 0.002 m in diameter and 0.30 m long. Bulb 1 contains helium, and bulb 2 contains nitrogen. The pressure and temperature are maintained at 2 atm and 95C. The diffusivity is 0.18 cm²/s. At time t=0, diffusion occurs between the two bulbs. At a later time, the helium mole fraction at End 1 of the tube is 0.80, and 0.15 at the other end. Determine at the later time the:

(a) Rates and directions of mass transfer of helium and nitrogen;

(b) Transport velocity of each species;

(c) Molar-average velocity of the mixture

Please show me how to do this.

Answer 1

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