Question

Based on the kinetics data below, determine the rate law including the rate constant. Describe the process you used to arrive at your answer. 2 C4H6 —> C3H12 t(min) (C«Hs) (M) 0 0.500 30 0.403 60 0.338 90 0.291 120 0.255 150 0.227 180 0.205 Perma

Answer 1

the One of the Melted to determine order of Reation is Vant hoff Mulhert. a, a &t values substituted the kinetic Equations of different orders orders, The Equation gives Constant value of Rale constant for different Order of Ryn time intervals In Ihis way is determined. Zero order Rxn. (a-x) t at time at time 30min ko 0.15 – 8.403 30 = 0.00323 => K = Ec min 005 0.338 Ko = 0.00 27 => 60 at time go min ko = 0.0023 0.54 0.291 90 so It's not Zero not gelling sonstant k values order first order Ryn, Ron go for

* = 2 303 log car al time 30 min 2.303 log 0,5 0.403 => 0.04646 lap (1.240) 30 => 0.00717 mint at time bomin logs (147928) 0.50 =0.0 38383 ki 2.303 60 long 0.338 0.00652 mint at time 90 min 2.303 Kp = 303 logo 0.5 0.291 => 0.025st log (1.7782130) =) 0.006013 mint for not getting Constant k values, so go second order Ryn. k = + list at time 30 min K2 t-t T 0.403 0.097 6.045 =7 0.0160 M. mint at time bomin I s t us) -7 = 0:0159 T 09 k₂= 0.162 10.14 - 0.338 0.016 M mint at time 90 min K2=t to Coton ots] => 0.doq => 0.0159 -700016 M mint (s.o 130095

we Zero second order Constant k vales. Order is Second order Rxn values in aix et Substituting Reaction. get There fore gives rate law & [ C4H6]² Rate Cons faint K, = 0.016 M Sett mint