Question

The following data are obtained for the decomposition of N,Og at a certain temperature: 2N205(9) - 4NO2(g) + O2(9) Time(s) N205 (atm) 0 2.40 200 2.13 400 1.88 600 1.67 800 1.48 Find the rate constant kobs for this first-order decomposition reaction. (Enter in sec-1) Submit Answer Tries 0/99

Answer 1

- 2 N₂O5 (9) Time(s) Nos (alm) o 2.40 200 2.13 4NO2 (g) + O₂19) 400 600 1.88 1.67 800 1.48 for the first order reaction Rate constant Konserved Acc. to rate law I rate = k· [N₂O5] and rate = -A[N₂O5] At k. [N,Os] = -D[NO] At initial concentration (from starting attro, t=200, uertato) from initial to 200 sec - A[NO]= batez -(2:13-2:40) = 0.00135 at 200-0 200 to you frate), I tle88-2/3) = 0.00125 200 You to 600 (rateſ 2 = -(1.67-1.88) = 0.0olor Go to so pate i (148-167) = 0.00095 200