THIS IS THE QUESTION: methanol is now added with mixing so that the total depth of liquid is 4.5 feet. What is the evaporation rate of n-hexane, assuming no layers?

Given:

- Your pure liquid, n-hexane, sits in a rectangular tank of inner dimensions 8 ft x 5 ft and 6ft deep. n-hexane occupies the bottom 1.5 feet. The temperature is 25 'C, and the pressure is 760 mm Hg.

- Water is added to the tank so that the total depth of liquid is 3 feet under the same conditions. For the following, state any assumptions and give each stage of your thinking.