CHEM 210 Covalent Bonding and Climate Change Assignment

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Chemistry 2010 Homework 4: Climate Change and Energy and Ozone 1. What is a greenhouse gas? Give three examples 2. What type of electromagnetic radiation is most responsible for global warming? 3. What two processes have caused the amounts of CO2 to increase in the atmosphere over the last 100 years? 4. There have been several movements to cut back on CO2 emissions. Why is there resistance? 5. What is the difference between climate and weather? 6. What is the main barrier to rolling back carbon emissions? 7. What is "clean coal". 8. Draw a diagram of two waves. Show the wavelength. 9. Define frequency and velocity of a wave. 10. The terms “radiation and radioactivity are frequently used interchangeably, yet they are not the same things. Explain the difference. 11. What is “ionizing radiation”? 12. On the electromagnetic spectrum below, indicate which end is the higher energy end. 13. Cell phones run on radio frequency. Is there a danger from this type of energy? 14. Why would it be bad for more UV to make it to the planet’s surface? 15. What molecules were responsible for the depletion of the ozone layer? How were they produced? 16. What is a "free radical"? Why are they dangerous? 17. What was done to decrease the amount of ozone depleting chemicals in the environment? 18. For each of the following, indicate what it does to molecules: a. microwaves b. UV c. IR Homework 5 2010: Nomenclature (covalent), Equations, air 1. In a covalent bond, electrons are: a. shared b. transferred 2. Write the names of the following: a. NO2 b. PCl3 c. CO d. SO2 e. H2 3. Write the formulas for the following: a. dinitrogen monoxide b. carbon tetrachloride c. carbon dioxide d. sulfur trioxide e. dihydrogen sulfide f. water 4. To a chemist, what does the word, “combustion” mean? 5. Balance the following a. CH4 + O2 ---→ CO2 + H2O b. S + O2 ---→ SO3 c. C8H18 + O2 ---→ CO2 + H2O 6. What are the major components of air? 7. Combustion of fossil fuels produces carbon dioxide and water vapor. However other things such as carbon monoxide and short chain hydrocarbons are also produced. Why? ...
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pallveechem123
School: UC Berkeley

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Chemistry 2010 Homework 4: Climate Change and Energy and Ozone

1. What is a greenhouse gas? Give three examples
Greenhouse gases are those gases that absorb Infrared radiation from the Sun
and, radiate heat as a result. In earth’s atmosphere, Greenhouse gases absorb
IR from the sun and release it. A part of heat radiated by greenhouse gases
reaches the earth in addition to the heat from the Sun after penetrating the
earth’s atmosphere, leading to absorption by the earth and to release into
atmosphere subsequently. A part of heat released by the earth is reabsorbed by
greenhouse gases; thus, a cycle perpetuates. Examples of Greenhouse gases
are carbon dioxide, nitrous oxide, ozone methane and water vapor.

2. What type of electromagnetic radiation is most responsible for global
warming?
Infrared electromagnetic radiation is most responsible for global warming.
3. What two processes have caused the amounts of CO2 to increase in the
atmosphere over the last 100 years?
Deforestation: Trees are instrumental in absorbing and removing CO2
emissions from the air. Cutting trees leads to increase of CO2 in the
atmosphere for the fact that absorbing vegetation is reduced.
Transportation: Across the world, transportation is one of the largest
sources of increased CO2 in the atmosphere. With the increase of
locomotive in the world, the exponential increase in CO2 r...

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