You are designing a process that involves mixtures of the compounds n-butane, n-hexane, 1,3-butadiene, and benzene. You are considering whether distillation will be an effective means of separating such mixtures. As a first step, you have decided to determine the boiling points of each of the four compounds at each of the following pressures: P = 0.5 bar, P = 1 bar, P = 3 bar, and P = 5 bar. Thus, you are determining 16 unknown boiling points—four for each of the four compounds.

A. Give your best estimate of each of the 16 boiling points, using only information contained in the Appendices of this book.

B. Give your best estimate of each of the 16 boiling points, using the best research resources you have available to you.

C. Comment on your answers to parts A and B.

How many of your answers were significantly different?

D. Compare what you now consider your best estimates of the boiling points for the four compounds at the four pressures. Does the range of boiling points  get larger, smaller, or stay roughly the same as pressure increases?

E. What, if anything, do you learn from the outcomes of parts A through D that might be useful in designing a separation process for these four  compounds?