However, in the upper atmosphere ozone is a very useful gas, because it absorbs

Question

However, in the upper atmosphere ozone is a very useful gas, because it absorbs ultraviolet radiation and protects the earth from this high energy, damaging radiation. It is referred to as the ozone layer. This ozone layer is depleted by the catalytic action of gases like Freon, which are commonly used in refrigerators and air conditioners. Chemically these gases are unreactive and rise into the upper atmosphere. The high energy radiation in the upper atmosphere produces very reactive chlorine atoms according to the reaction below: CCl2F2(g) arrow CCIF2(g) + Cl(g) (catalyzed by uv radiation) The following questions refer to the depletion of ozone in the upper atmosphere according to the mechanism shown below:

Explanation / Answer

1) False, The rate law for the mechanism is Rate = K [Cl] [O3]

2) True, Cl is the catalyst since it is regenerated in the second step

3) False, The rate law is deduced from the coefficients of the elementary reactions

4) True, Since ClO is consumed within the reaction

5) True, Since 2 reactant molecules are involved

6) True, if you add both the equations and cancel common compounds in LHS and RHS you get O + O3 ---> 2O2

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