concentr 4.16 Consider the following chain-reaction mechanism for the high-temperat formation of nitric oxide, i.e... the Zeldovich mechanism: O+N, NO+N Reaction I N+O, NO+O Reaction 2 A. Write out expressions for d[NO]/dr and d[N]/dr. B. Assuming N atoms exist in steady state and that the concentrations of O, O., and N, are at their equilibrium values for a specified ten perature and composition, simplify your expression obtained above for d[NO]/dr for the case of negligible reverse reactions. (Aner d[NO]/dt = 2k,[0],[N]) C. Write out the expression for the steady-state N-atom concentration used in part B. D. For the conditions given below and using the assumptions of part how long does it take to form 50 ppm (mole fraction - 10") of NO T=2100 K. p=0.167 kg/m, MW 28.778 kg/kmol, Xo 7.6-10 (mole fraction), 3.025-10-(mole fraction). Xo, Xs, 0.726 (mole fraction). ky 1.82 101 expl-38,370/7(K)] with units of cm/gmol-s E. Calculate the value of the reverse reaction rate coefficient for the first reaction, i.e., O+N, NO + N. for a temperature of 2100 K. F. For your computations in part D, how good is the assumption that reverse reactions are negligible? Be quantitative. G. For the conditions of part D, determine numerical values for [N] and X- Note: k 1.8 100 T exp(-4680/7) with units of cm/gmol-s. =