an ethanol (a)-water (b) solution in the form of a stagnent film 2.0 mm thick at 293 k is in contact at one surface with an organic solvent in which ethanol is soluble and water is insoluble. hlence, nu-0. at point i the concentration ethanol is 16.8 wt % and the solution density is 972 8 kg/m'. at point 2 the concentration of ethanol is 6.8 wt % and the solution density is 988.1 kg/m'. the diffusivity of ethanol is 0.740 x 10 m/k calculate the steady state flux n, in 36 hours.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

truck y has a greater velocity than truck x.