Question

Parts a, b, c, and e please.

3. (70 pts) (3a) Consider the graph shown on page 6, where reactant species A decomposes to product (P). Determine the order and rate constant with respect to A. Show your work on page 6, not here. A (guessed) correct answer without showing work and/or reasoning will earn 0 points. Kinetics II (3b) Write the balanced equation and determine the expected rate law for the mechanism described below. Oa(g)HO(g)HO2(g) + O2(g) fast 1 HO2(g) + O(g) 2 slow HO(g) O2(g) (3c) Identify the role each species has in the mechanism shown in (1b). O2aXast Tnrngate HO TnXioe HO 20s Cateles (3d) The reaction CO(g) + Cla(g) COCla(g) at 250°C is 1.50 x 103 times faster than at 150°C. What is the activation energy for this reaction? 523 23k AH S23k Iin (i.soyo)=.314 0z) 6yoL62 -.001412 0454) 34511.4104 A.H 7 3/322031 134.5 60,r02 1143-AH( 4520204t) 4. s2o2030 lo0o 4.sterozio (3e) Assuming the reaction in (3d) is first order overall, is it more likely that it is first order with respect to carbon monoxide or chlorine? Explain. Les Struetre. Carbon monovide

Answer 1

solution conc. of It is an example 9 first-order reaction since concentration Vs time graph is not linear. in this case as concentrativo decreases with time (5) time. Ratt g a reaction can be written as gate --d(A) KfAl ratt = K[A] Kurate constant & given: 0 0 1 + H 17 Hd ( + Qa) past ta (9) + Oy) - 09) + a(9) slow Overall balanced b r a 20. 1

3C → reactant HD -> entromediate Hgintermediate q-product. 0-reactant & cog) + Cle(g) - cockerer at T= 250°C +273 F 523 K T = 150°C +273 = 423 k. K = 1.50X103 2=1 Fu = ? Formula Rygas constant = 8.314 → (1:50x103) la tesz 1 8.314 423 >> 7313 Ea a 4.52 X164 8.314 & Ea = 7.313 x 8.314 = 134.5 X103 J ① 134:5 KJ 4.52X154 activation energy s. Ea = 134.5 kJ )