Relationship between relaxation time and flow diagram non-exponential decay slowing down

Relationship between relaxation time and flow diagram non-exponential decay (slowing down) 

We are dealing at present with systems which have only one independent concentration, and hence which are governed by a single rate equation. Thus eqn (8.2) can be written in the general from 

In this form we can think in similar terms to those used in chapter 3 where we 

We have also found it helpful to think of the rate equation for CSTR systems in terms of a flow rate L and a reaction rate R, and eqn (8.2) has the form 

Thus A can be interpreted in terms of the difference in the slopes of the flow and reaction curves on the flow diagram, as illustrated in Fig. 8.2. 

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