Entropy defended

Brunauer (see Refs. 136-138) defended these defects as deliberate approximations needed to obtain a practical two-constant equation. The assumption of a constant heat of adsorption in the first layer represents a balance between the effects of surface heterogeneity and of lateral interaction, and the assumption of a constant instead of a decreasing heat of adsorption for the succeeding layers balances the overestimate of the entropy of adsorption. These comments do help to explain why the model works as well as it does. However, since these approximations are inherent in the treatment, one can see why the BET model does not lend itself readily to any detailed insight into the real physical nature of multilayers. In summary, the BET equation will undoubtedly maintain its usefulness in surface area determinations, and it does provide some physical information about the nature of the adsorbed film, but only at the level of approximation inherent in the model. Mainly, the c value provides an estimate of the first layer heat of adsorption, averaged over the region of fit. 

One of Perrin s students, the brilliant Rene Marcelin who perished in the First World War, set to work on the general problem, demonstrating that, in addition to the Arrhenius activation energy, the rate constant had to contain an activation entropy term. 76 In his thesis, defended in 1914, Marcelin developed a general theory of absolute reaction rates, describing activation-dependent phenomena by the movement of representative points in space. 

Use these values to criticize or defend the following proposition The smaller endothermic value for AH% in CTABr means the product molecules must be more readily expelled from these micelles, making the enthalpy contribution more favorable to the reaction in this case. The solubilized substrate has a higher entropy, so the decrease in entropy for the micellar reaction is larger. The last problem shows that the reaction occurs about twice as fast in water as in 0.01 M NaLS. The rate in water determines the kinetic parameters in the last case. 

If we restrict ourselves to time intervals which are experimentally realizable, the statistical interpretation is equivalent to the requirement that the entropy of an isolated gas quantum should always increase.153 Beyond that, however, one can in fact defend two opposite points of view. 

By contrast, I-330, D-503 s lover and a member of the rebellion, refuses to accept this view of the world as inert, closed, and finite, asking instead how can there be a final revolution and arguing that [t]here is no final one. The number of revolutions is infinite. This argument is used to defend a world in which boundless energy, and not entropy, is the defining feature... 

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