The second kind changes of laws

The second kind changes of laws are met when, for example, shape of the A sanq)le and possibly its sizes in the case of powder are changed. We will meet this type of change when we will examine the phenomena of nucleation-growth (Chapter 10). 

In the reactions with separable rate, the second kind of changes of laws relate to the space function, there is no change of mechanism nor of mode, thus, the reactivity is not affected. 

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