The following is a quote from an article in the August 18, 1998, issue of The Ne

Question

The following is a quote from an article in the August 18, 1998, issue of The New York Timesabout the breakdown of cellulose and starch: "A drop of 18 degrees Fahrenheit [from 77 ?F to 59 ?F] lowers the reaction rate six times; a 36-degree drop [from 77 ?F to 41 ?F] produces a fortyfold decrease in the rate."

Assuming the value of Ea calculated from the 36-degree drop and assuming that the rate of breakdown is first order with a half-life at 25 ?C of 2.7 years, calculate the half-life for breakdown at a temperature of -15 ?C.

Explanation / Answer

A) Half-life and rate constant for a 1st order order reaction are related as: t A) Half-life and rate constant for a 1st order order reaction are related as: t

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