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Ethanol vapor is absorbed from binary gas mixture of ethanol vapor and water vapor using a nonvolatile solvent in which ethanol is soluble but water is not. The total pressure is 760 mmHg. The ethanol vapor is diffusing through a film of ethanol-water vapor mixture of 0.2 mm thick. The mole percent of the ethanol in the vapor at point 1 at one boundary of the film is 70%, and at the other boundary at point 2 is 20%. The diffusivity of ethanol-water vapor mixtures at 25 C and 1 atm is 0.135 cm-/s. The area of the film is 10 m. Given that the molecular weight of ethanol is 46.07 kg/kg mol. Calculate the rate of diffusion of ethanol vapor in kg/h if: (1) The temperature is 25 C (10 marks) (ii) The temperature is 70 C (8 marks)