Page 59 - Introduction to chemical reaction engineering and kinetics

2.8 Problems for Chapter 2 41

2-8 Repeat Example 2-4 for the case with O2 as the limiting reactant.
2-9 (a) Construct a stoichiometric table in terms of partial pressures (pi) for the gas-phase decom-
position of nitrosyl chloride (NOCl) to nitric oxide (NO) and chlorine (Clz) in a constant-
volume batch reactor based on the following initial conditions: $?NoCl,o = 0.5 bar, p~,~ =
0.1 bar, and (inert) PN2,0 = 0.4 bar.
(b)If the reaction proceeds to 50% completion at a constant temperature, what is the total pres-
sure (P) in the vessel?
(c) If the temperature changes as the reaction proceeds, can the table be constructed in terms
of moles? molar concentrations? partial pressures? Explain.
2-10 For the system in problem 1-3, and the equations obtained for part (b), construct an appropriate
stoichiometric table. Note the significance of there being more than one chemical equation (in
comparison with the situation in problems 2-8 and 2-9).