Reference no: EM133215444

Methanol vapor is being absorbed from a mixture of alcohol vapor and water vapor by means of a nonvolatile solvent in which the alcohol is soluble, but the water is not. The temperature is 97 C and the total pressure is 760 mm Hg. The alcohol vapor can be considered to be diffusing through a film of alcohol-water vapor mixture 0.45 mm thick. The mole percent of the alcohol in the vapor at the outer edge of the film is 55 percent. On the inner edge (in contact with the solvent) the mole percent is 5 percent. Calculate the rate of diffusion of alcohol vapor in kilograms per hour if the area of the film is 10 m².

Use the Chapman-Enskog equation (Eq. 17.28) to calculate the diffusivity of methanol in water.