Oxygen and Ozone 0.0 / 5 ? ChemistryStructure and BondingInternational BaccalaureateOther Created by: Lotto65Created on: 26-01-17 18:58 What is stronger a) the double bond between oxygen atoms or b) the 1.5 bond between oxygen atoms in ozone? a) the double bond 1 of 23 How does the difference in bond strength between oxygen and ozone help? Helps to protect us from the sun's harmful UV radiation 2 of 23 Where is the ozone layer? In the stratosphere about 12-50km above the surface of Earth 3 of 23 True/false: The ozone cannot be continually formed and decomposed False 4 of 23 What can break the strong double bond between oxygen atoms? High energy UV light from the sun 5 of 23 What is formed when high energy UV light from the sun breaks the double bond in oxygen atoms? Oxygen radicals 6 of 23 What do we mean by an oxygen radical? An oxygen atom with an unpaired electron and are very reactive 7 of 23 Oxygen radical + Oxygen --> Ozone 8 of 23 What breaks the weaker bonds in ozone? Lower energy UV light 9 of 23 Ozone + Lower energy UV --> Oxygen + oxygen radical 10 of 23 Ozone + Oxygen radical --> Oxygen 11 of 23 The rate of production of ozone =... The rate of destruction of ozone 12 of 23 How can you describe the equal rates of ozone construction and destruction? Steady states 13 of 23 Give examples of human-made pollutants that have disrupted the ozone construction/ destruction process CFCs and nitrogen oxides 14 of 23 What has been the effect of CFCs and nitrogen oxides disrupting the ozone construction/ destruction process? Holes have appeared in the ozone layer over the north and south poles in winter and early spring 15 of 23 How many resonance hybrids does ozone have? 2 16 of 23 What happens to UV with a longer wavelength with ozone? Has a lower energy so is absorbed to break the bonds in ozone 17 of 23 What is the name of the reaction where carbon and chlorine come apart to produce chlorine radicals? Homolytic fission 18 of 23 Why does the C-Cl bond break in CFCs and not the C-F bond? C-Cl bond is weaker 19 of 23 What do the chlorine radicals do? Break down ozone molecules which regenerates more radicals so the process continues until the radicals escape or terminate 20 of 23 What evidence supports the theory that CFCs are diminishing the ozone? Increase in chlorine monoxide concentration has mirrored the decrease in ozone concentration 21 of 23 Because chlorine does not get used up, what can we say it is? A catalyst 22 of 23 What else acts as a catalyst to break down ozone? Nitrogen oxides 23 of 23
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