Read up on the Ozone hole. What is the mechanism for the destruction of the ozone layer?

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Keith LeannonLv2

30 Oct 2019

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The rate constants for the reactions of atomic chlorine and hydroxyl radical with ozone are given by 3 x 10-11e-250/T and 2 x 10-12 e-940/T where T is the temperature in Kelvin. Calculate the ratio of rate of ozone destruction by atomic chlorine to the rate of ozone destruction by hydroxyl radical in the Antarctic ozone hole, in which the temperature is -80 oC and the concentrations of atomic chlorine and hydroxyl radical are equal. Assume that the reaction of ozone with the X. species ( either atomic chlorine and hydroxyl radical) is rate determining.

One of the CFCs that is implicated in decreasing the ozone layer and formation of the ozone hole over Antarctica is Freon-12 or CCl2F2. Calculate the density (in g/L) of Freon-12 at STP and compare it to the average density of air. Suggest how Freon-12 can get into the stratosphere to threaten the ozone layer.

Which of the following statements about the earth's atmosphere is correct?

a. The mechanism for a story in the ozone layer over Antarctica involves the formation of polar stratospheric clouds

b. The first step in formation of ozone in the stratosphere is the photoionization reaction.

c. All wavelengths of solar radiation can initiate photoionization reactions.

d. The temperature of the atmosphere steadily decreases with increasing altitude.

e. The 'hole' in the ozone layer over Antarctica changes in magnitude and area throughout the year.

We never covered this in class. I do know that the hole changes over the year. So my guess is e. But I want to get some confirmation. Thank you!!!