A tank is constructed as a cylinder surmounted by a frustum of a cone. The tank is filled in the cylindrical section with 1-butanol. On a hot day of about 30C and normal atmospheric conditions, the lid was left uncapped so that n-hexane evaporates at steady state. The diameter of the cylindrical part is 1.25m and the opening is 0.30m. The height of the frustum of the cone is 0.75m. a. Estimate the diffusivity of 1-butanol in air using the Chapman-Enskog Equation and the Fuller et al. Method. b. Using the value determined by the Chapman-Enskog Equation, determine the mass flux of 1-butanol leaving the opening of the tank. c. Determine the loss of 1-butanol in kg/day