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Sources of Energy, Thermochemistry (College)

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Sources of Energy, Thermochemistry

1. 
Which of the following always result as products of the combustion of fossil fuels?
  1. carbon dioxide and oxygen
  2. carbon, oxygen, and water
  3. carbon dioxide and water
  4. hydrocarbons, only
2. 
Which of the following are present in petroleum?
  1. carbon, only
  2. hydrocarbons
  3. hydrogen, only
  4. carbon, hydrogen, and oxygen
3. 
Which of the following hydrocarbons are present in natural gas?
  1. Methane
  2. Ethane
  3. Butane
  4. All of the above
4. 
How does the boiling point of octane compare to that of butane, and why?
  1. It has a lower boiling point, because it has stronger intermolecular forces
  2. It has a lower boiling point, because it has weaker intermolecular forces
  3. It has a higher boiling point, because it has stronger intermolecular forces
  4. It has a higher boiling point, because it has weaker intermolecular forces
5. 
Which of the following can be used as an "anti-knock" agent?
  1. Tetramethane
  2. Diethyl ether
  3. Methyl ethyl ether
  4. Trimethyl lead
6. 
Which of the following petroleum fractions is used in asphalt?
  1. [math]C_5 - C_10[/math]
  2. [math]>C_25[/math]
  3. [math]C_10 - C_18[/math]
  4. [math]C_15 - C_25[/math]
7. 
Which of the following petroleum fractions is used in gasoline?
  1. [math]>C_25[/math]
  2. [math]C_15 - C_25[/math]
  3. [math]C_10 - C_18[/math]
  4. [math]C_5 - C_10[/math]
8. 
Approximately what percentage of carbon by mass is present in anthracite?
  1. 91%
  2. 80%
  3. 76%
  4. 70%
9. 
Complete the following chemical equation for reaction of methane and water. Be sure to cite the ∆H value.

[math]CH_4 + H_2O rarr[/math] ?










10. 
Name ONE anthropogenic source of emission of carbon dioxide gas in the atmosphere.



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