PRACTICAL 8: UNIT CONVERSIONS, EQBM, FICK¡¯S LAW
3. A tank contains a 50L mixture of ethanol in water and is open to the atmosphere ( 25C, 1 atm) where the relative humidity is 0 %, but in a location where the air above the tank can be considered stagnant.
a) If the mole fraction of ethanol in the tank is 5 %, what is the concentration of ethanol on the air side of the interface? (Henry¡¯s constant is give as H = 2 mol/(m3.Pa)
b) If the mole fraction of ethanol in the tank is 20 %, what is the concentration of ethanol on the air side of the interface?
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c) How do your answers to (a) and (b) change if the relative humidity is 90 %?
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