3. Ozone is often produced in the troposphere (the layer of air nearest the eart

Question

3. Ozone is often produced in the troposphere (the layer of air nearest the earth's surface). Several investigations indicate that one way it can be produced is by the following sequence of reactions (mechanism). The overall reaction is 3/2 02- O3 (all gaseous): NO(g) +1/2 O2(g) NO2(g) NO2(g) + light- NO(g) +O(g) O2(g) + O(g)- O3(g) a). The above reaction is catalyzed, from your understanding what is the best definition of a catalyst Solution: Salution: A Substance thot spueds up chemical reactrons lewsering the octuetion energy tequired For te reaction to louwerina the octiuction b). Name two things in the above reaction that you consider to be catalysts.

Explanation / Answer

A catalyst is a substance which enhance the rate of reaction by showing a lower activation energy path for rraction and will be eliminated at the end of the reaction without appear in the final product.

In the above reaction dissociation of molecular oxygen into oxygen radical is necessary step. This was carried by the aid of NO and light.

So, NO and NO2 are catalysts.

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