Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is _________________________?

Question

Accepted Answer

8.5 × 10-4. The flux (N_A) is calculated using the overall mass transfer coefficient (K_L) and the driving force: N_A = K_L * (y - y*) where y* is the equilibrium concentration corresponding to x. The calculation yields 8.5 × 10^-4 kg mole/m^2.s.