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this is the full question from a pastpaper
1. (a) An important route to the formation of nitrous oxide (N20) in the atmosphere is the sequence of reactions below: 0 JOD) b) ('D)+02 O('D)+M_* (P)+M O('D+N, +M_N,O+M NO ►N,+O('D) MNO) which relies on the photolysis of ozone (O3) at wavelengths below 411 nm to yield O('D) and includes the photolytic destruction of N20 which itself yields O(D). A steady state analysis yields the following for the concentration of N20 [NO] - HOD)K, 2 [O, IN,] J(NO)k, (0) Given the following information, ky = 3.20 x To-11 exp(-61/T(K)) cm's-1 - -0.88 (T/K) k2 = 2.80 x 10-36 cms-1 10 km TIK P/Pa [Os]/cm JOD) /s JINOIS 225 2.86x104 1.73x10 3.16*10-4 2.51x10-12 40 km 248 3.27x102 5.31x1011 2.15x10 1.58 107 calculate the N20 concentrations at 10 km and 40 km and express them in terms of relative concentrations in ppmv, ppby or pptv. Cont.../
1. (a) An important route to the formation of nitrous oxide (N2O) in the atmosphere is the sequence of reactions below: 0,105) 0(D)+02 0('D)+M_*(P)+M ('D)+N2 + M>N,O+M N,O ►N, +0(D) + JINO) which relies on the photolysis of ozone (O3) at wavelengths below 411 nm to yield O('D) and includes the photolytic destruction of N20 which itself yields O('D). A steady state analysis yields the following for the concentration of N20: [N,0] - JOD)K2 [0,IN,). J(NO) (1) Given the following information, ki = 3.20 x 20-11exp(-61/T(K)) cm's-1 -0.88 k2 = 2.80 x 10-36 [(T/K) 300 cms-1 10 km 40 km TIK РІРа [0]cm JOD) ist J/N:O) /s 225 2.86x10 1.73x 1012 3.16x 10- 251x10-12 248 3.27x102 5.31x1011 2.15x100 1.58 107 calculate the N2O concentrations at 10 km and 40 km and express them in terms of relative concentrations in ppmv. ppby or pply. Cont..)