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[tengkualfie]

Hello.. i am currently doing my design project for the production of chlorobenzene. in designing a reactor, i need to know the rate law equation. i'm having a difficulties on that. can anyone help me on this?..thanks

 

chemical equation:

 

C6H6 + Cl2 ------> C4H5Cl + HCl

C4H5Cl + Cl2 --------> C4H4Cl2 + HCL

 

The information that i get from journal:

 

 

R_b=-k₁C_b     (Beck U. et al,2011)

R_m=k₁C_b-K₂C_m         Beck U. et al,2011)

R_d=k₂C_m        (Beck U. et al,2011)

k1= 1 x 10^-4 s^-1 at 55°C (Beck U. et al,2011)

k2= 0.15 x 10^-4 s^-1 at 55°C (Beck U. et al,2011)

 

Whereby, b = benzene, m = monochlorobenzene, d = dichlorobenzene

 

i dont really understand..can it be in overall total rate law equation?

 

[MrShorty]

It has been a long time since I have done this, but I do recall doing these kinds of problems in my undergraduate work. A quick review of my old physical chemistry textbook reveals an entire chapter dedicated to reaction kinetics, with a section devoted to discussing how to calculate reaction rates for "consecutive reactions" (assuming we are going to model this as a consecutive reaction). The discussion is also summarized here (https://www.boundles...laws-427-3648/? ) and in Wikipedia (http://en.wikipedia.org/wiki/Rate_equation ). Study this material, satisfy yourself that these are consecutive reactions, then you can apply the equations as explained.