PHYSICAL CHEMISTRY IN BRIEF

(Wang) #1
CHAP. 9: CHEMICAL KINETICS [CONTENTS] 275

b) Type
A + B→products, (9.28)

when the partial orders equal one and the reactants have unit stoichiometric coefficients;
c) Type
aA +bB→products, (9.29)


when the partial orders equal one and the reactants have general stoichiometric coefficients.


9.2.3.1 Type.


2 A→products. (9.30)

9.2.3.2 Kinetic equation



dcA

=kc^2 A. (9.31)

9.2.3.3 Integrated forms of the kinetic equation


For time as a function of the reactant concentration we write


kτ=

1

cA


1

cA0

. (9.32)

For the concentration of substance A as a function of time we write


cA=

cA0
1 +cA0kτ

. (9.33)

9.2.3.4 Reaction half-life


τ 1 / 2 =

1

kcA0

. (9.34)
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