P12-16g The elementary reversible liquid-phase reaction AAB takes place in a CSTR with a heat exchanger. Pure A enters the reactor. CALLY a (e) Vary the ambient temperature T, and make a plot of the reactor temperature as a function of T, identifying the ignition and extinction temperatures. (1) If the heat exchanger in the reactor suddenly fails (i.e., UA = 0), what would be the conversion and the reactor temperature when the new upper steady state is reached? (Ans.: 431 K.) (g) What heat exchanger product, UA, will give the maximum conversion? (h) Write a question that requires critical thinking and then explain why your question requires criti- cal thinking. (Hint: See Preface Section G.) (i) What is the adiabatic blowout flow rate, U? 6) Suppose that you want to operate at the lower steady state. What parameter values would you sug- gest to prevent runaway, c.g., the upper SS? Additional information UA = 3600 cal/min K E/R = 20,000 K Cp, = Cpg = 40 cal/mol K V = 10 dm AHRX = -80,000 cal/mol A 1) = 1 dm /min Kc = 100 at 400K FAO = 10 mol/min k = 1 min 1 at 400 K Ambient temperature, T. = 37C Feed temperature, T, = 37C