Determine the rate at which the ethanol should be supplied

Reference no: EM131310690

Ethanol, C2H5OH, flows in a thin film down the outside surface of an inclined plane, 2 m wide and 4 m long. The liquid temperature is 289 K. Ethanol-free air at 303 K and 1 atm flows across the width of the plate parallel to the surface.

At the average temperature of the gas film, the diffusivity of ethanol vapor in air is 1:32 × 10^-5 m²/s, The vapor pressure of ethanol is 6:45 × 10^-2 atm at 289 K.

If the air velocity is 3 m/s, determine the rate at which the ethanol should be supplied to the top of the plate so that evaporation will prevent it from reaching the very bottom of the plate.

Reference no: EM131310690

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