P$6-1$ A ${?}_A($a$)$ Make up and solve an original problem to illustrate the principles of this

chapter. See Problem P$4-1$ A for guidelines.

$($b$)$ Write a question based on the material in this chapter that requires critical

thinking. Explain why your question requires critical thinking. $[$Hint: See

Preface section B$\mathrm{.}2.]$

$($c$)$ Choose a FAQ from Chapter $6$ to be eliminated and say why it should be

eliminated.

$($d$)$ Listen to the audios on the $CD$ and then pick one and say why it

was the most helpful.

$($e$)$ Which example on the CD$-$ROM Lecture Notes for Chapter $6$ was least helpful?

P$6-2$ A $($a$)$ Example $6-2.(1)$ What would have been the selectivity $S_{\frac{B}{x}Y}$ and con$-$

version, $x,$ if the reaction had been carried out in a single PFR with the

same volume as the CSTR$?(2)$ How would your answers change if the

pressure were increased by a factor of $100?$

$($b$)$ Example $6-3.$ Make a table$/$list for each reactor shown in Figure $6-3$

identifying all the types of reactions that would be best carried out in this

reactor. For example, Figure $6-3($d$)$ Semibatch: used for $(1)$ highly exo$-$

thermic reactions and $(2)$ selectivity, for example, to maintain concentra$-$

tion A high and B low and $(3)$ to control conversion of A or B$.$