The acceleratory region

Kinetic analyses during the acceleratory stage of reaction, therefore, may necessitate corrections to both variables, (a — a0) and/or (t — f0) and the plots used to identify the rate equation may be insensitive. Again, the importance of microscopic or other independent observations, is obvious. 

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From microscopic measurements of the rates of nucleation and of growth of particles of barium metal product, Wischin [201] observed that the number of nuclei present increased as the third power (—2.5—3.5) of time and that the isothermal rate of radial growth of visible nuclei was constant. During the early stages of reaction, the acceleratory region of the a—time plot obeyed the power law [eqn. (2)] with 6 temperature coefficients of these processes were used by Wischin [201]... 

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