Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Physical Chemistry

Created by: Asf Institute

Chemistry : Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

The document Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev is a part of the Chemistry Course Physical Chemistry.
All you need of Chemistry at this link: Chemistry

PARALLEL REACTION

Parallel reaction are those reaction in which the reactant can form one of two or more products 

Consider the following parallel reaction in which reactant A can form two products B & C.

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

The rate law for the reactant and products are :

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev           = –kB[A] – kc[A] = –(kB + kC)[A]                         …(1)

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev= kB[A]                                …(2)

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev = kC[A]                              ....(3)

Integration of equat ion (1) with the init ial condit ion [A]0 ≠ 0 and [B] = 0 = [C] yields

[A] = [A]0 e-(kB + kC )t                         .......(4)

Integration of equation (2), we get

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRevParallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev                   …(5)
Similarly

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev                    …(6)
i.e. the ratio of concentration of product is

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

i.e. the product concentration ratio remains constant with time.
The yield, φ, is defined as the probability that a given product will be formed by decay of the reactant.

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

The quantum yield of product [B] is φB = yield of [B] =

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

The quantum yield of product [C] is

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Problem.  Find the quantum yield of [B] & [C] in the following reaction

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Sol.

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev                  …(1)
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev                   …(2)

then

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Problem.  Find the quantum yield of [B], [C] & [D] in the following reaction.

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Sol.

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev  …(1)

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev…(2)

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev…(3)

The ratio of formation of product [B], [C] & [D] are

 Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev
Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!

Dynamic Test

Content Category

Related Searches

Extra Questions

,

Summary

,

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

,

Important questions

,

Semester Notes

,

Objective type Questions

,

video lectures

,

ppt

,

mock tests for examination

,

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

,

study material

,

Free

,

Parallel Reaction - Chemical Kinetics Chemistry Notes | EduRev

,

MCQs

,

shortcuts and tricks

,

practice quizzes

,

Viva Questions

,

past year papers

,

Sample Paper

,

Previous Year Questions with Solutions

,

pdf

,

Exam

;