The oxidation of nitric oxide
NO + 0.5 O2 --> NO2
takes place in an isothermal batch reactor. The reactor is charged with a mixture containing 20.0
volume percent NO and the balance air at an initial pressure of 380 kPa (absolute).
(a) Assuming ideal-gas behavior, determine the composition of the mixture (component mole
fractions) and the final pressure (kPa) if the conversion of NO is 90%.
(b) Suppose the pressure in the reactor eventually equilibrates (levels out) at 360 kPa. What is the
equilibrium percent conversion of NO? Calculate the reaction equilibrium constant at the
prevailing temperature, Kpatm0:5, defined as
where pi(atm) is the partial pressure of species i (NO2, NO, O2) at equilibrium.
(c) Assuming that Kp depends only on temperature, estimate the final pressure and composition in the
reactor if the feed ratio of NO to O2 and the initial pressure are the same as in Part (a), but the feed
to the reactor is pure O2 instead of air.
(d) Replace the partial pressures in the expression for Kp, and use the result to explain how reactor
pressure influences the conversion of NO to NO2.
part c and d please with work shown, thank you.
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