Advanced Placement Calculus 2016 Graphical Numerical Algebraic Fifth Edition Student Edition + Mathxl 1-year License
5th Edition
ISBN: 9780133314533
Author: Prentice Hall
Publisher: Prentice Hall
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When metallic tin is kept below 13.2°C, it slowlybecomes brittle and crumbles to a gray powder. Tin objects eventuallycrumble to this gray powder spontaneously if kept in acold climate for years. The Europeans who saw tin organ pipes intheir churches crumble away years ago called the change tin pestbecause it seemed to be contagious, and indeed it was, for the graypowder is a catalyst for its own formation.A catalyst for a chemical reaction is a substance that controls therate of reaction without undergoing any permanent change in itself.An autocatalytic reaction is one whose product is a catalyst for itsown formation. Such a reaction may proceed slowly at first if theamount of catalyst present is small and slowly again at the end,when most of the original substance is used up. But in between,when both the substance and its catalyst product are abundant, thereaction proceeds at a faster pace.In some cases, it is reasonable to assume that the rate y = dx/dtof the reaction is…
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