PA2 - Department of Civil and Environmental Engineering...

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Department of Civil and Environmental Engineering Carleton University ENVE 2001, Winter 2016 Problem Analysis #2: Reaction Kinetics (January 27) Problem 1. A first-order reaction that results in the destruction of a pollutant has a rate constant of 0.1/day. (a) How many days will it take for 90 percent of the chemical to be destroyed? (b) How long will it take for 99 percent of the chemical to be destroyed? (c) How long will it take for 99.9 percent of the chemical to be destroyed? Comment on your answers. Problem 2. The 2011 Fukushima nuclear disaster was the largest since the Chernobyl disaster of 1986. It occurred after the Tohoku earthquake and tsunami and consisted of a several nuclear meltdowns and releases of radioactive materials. One and a half years after the disaster, Japan still bans the sale of 36 fish species caught off the coast of Fukushima, destroying the social and economic livelihood of the local region. A 2012 scientific paper reported two greenling fish close to the shore had greater than 25,000 becquerels (Bq) *
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