Convective Mass Transfer - Equimolar Counterdiffusion

The gas CO₂ is diffusing at steady state through a tube 0.2 m long having a diameter of 0.01 m and containing N₂ at 298 K.

The total pressure is constant at 101.32 kPa.

The partial pressure of CO₂ is 456 mmHg at one end and 76 mmHg at the other end.

The diffusivity D_AB is 1.67 x 10^-5 m² /sec at 298 K.

Calculate the flux of CO₂ (Sol.: J_A * =1.70 x 10^-6 gmol A/s. m² )