Water is flowing as a film down a vertical wall 1 m tall and 0.06 m wide at 10¹³ kPa and 298 K. There are no surface ripples with Re= 50, Sc = 356, μ=0.89 cP, =1000 kg/m3. The saturation concentration of oxygen is 0.0128 kmol/m³. 

Find 

(a) film mass flow rate per unit film width 

(b) film thickness 

(c) average velocity u̅?

(d) whether regime corresponds to short or long residence time 

(e) average mass transfer coefficient 

(f) area for mass transfer 

(g) the average concentration of oxygen