Consider a gas-phase reaction that occurs via the following sequence of elementary steps (l; are reactive intermediates): A 2B +11 K = 2.5*102 s-1 B+11212+ C k2 1*102 dm mot S-1 21 D K3=5*103 dm mot s1 In the overall stoichiometric reaction, 1 molecule of D is formed per event. (a) (b) Write the stoichiometric numbers (;) for each elementary step. Write expressions for the overall reaction rate, r, in terms of the rates of each elementary step, ri. Derive the rate expression for the rate of production of D, rp, in terms of rate constants and concentrations of reactants and products by applying the pseudo steady-state hypothesis (PSSH) for all reactive intermediates. A well-mixed, isothermal batch reactor of initial volume 1000 m is equipped with a piston to keep the reactor pressure constant. The reactor is charged with 5000 moles of pure A at t = 0. Calculate the time required to reach 75% conversion in the reactor and the final volume of the reactor. ()