Consider two bulbs containing different mixtures of gases and connected by a capillary as shown in the following figure.

In bulb A the gas mixture is composed of nitrogen and hydrogen with mole fractions of 0.46 and 0.54, respectively. In bulb B the gas mixture is composed of nitrogen and carbon dioxide with mole fractions of 0.52 and 0.48, respectively. The temperature and pressure of the bulbs is identical and equal to 298 K and 100 kPa.

The volume of each bulb is 100 mL, the length and diameter of the capillary are 0.1 m and 0.001 m, respectively. Under the conditions of the experiment the binary diffusion coefficients are known:

DN2-H2=7.79.10-5 m/s Dco2-H2 6.46.10-5 m/s DN2-C02 1.65.105 m/s

Calculate the composition change in each bulb as a function of time. Also, graphically represent.