Zero Order Reactions
Definition
If the rate
of reaction is independent of the concentration of reactants, then the reaction
is of zero order.
Or
Rate law for
zero order reaction states that, rate of reaction is proportional to the zeroth
power of concentration in terms of reactants.
Kinetics of zero order reaction
R Ã P
Rate
Rate = K0 [R]0 (as [R]0 =1)
Rate = K0
we know that Rate = dx/dt so, 
e.q. 2.1
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Figure 2.1: zero order reaction
(graph for equation 2.1)
dx
= K0 dt e.q.
2.2
integrating e.q. 2
x = K0 t + z e.q. 2.3
here z= integration constant. To find value of z
consider that at initial time t=0, the concentration is x=0. So, putting values
of x and t in e.q. 2.3 we got z=0. Putting value of z in e.q. 2.3
x
= K0 t e.q.
2.4
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Figure 2.2:
straight line graph for zero order reaction (graph for equation 2.4)
Rate constant for zero order reaction
and its unit
From e.q. 2.4
Unit of rate constant will be molL-1s-1
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- Opposing Reactions
- Experimental Methods For Determining Order Of Reactions
- CHEMICAL KINETICS (Introduction)
