Exam (elaborations)
PHSC 110 Chapter 5 Questions & Detailed Answers 2024
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PHSC 110 Chapter 5 Questions & Detailed Answers 2024
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PHSC 110 Chapter 5What are the main economic and social disadvantages of using corn ethanol as
fuel? - ANS Ethanol is more expensive per volume than crude oil.
Ethanol production consumes significant fossil fuels to provide energy to plant
corn and distill the alcohol.
Steps for the production of ethanol from corn in order - ANS 1. Corn kernels are
mixed with water
2. Enzymes break down starches into glucose.
3. Yeast fermentation converts sugars into ethanol.
4. The mixture is distilled
Success in business today is judged on three criteria; profitability, fair treatment of
employees, and environmental impact. This is known as the ____________ bottom
line. - ANS triple
In business, the "Green Zone' represents______________. - ANS The conditions
under which a business is successful economically, in its community, and in its
impact on the environment.
Bond Breaking = - ANS absorbs energy
bond forming = - ANS releases energy
, describe bond energy - ANS The total energy required to break apart a molecule
depends on the number and type of bonds.
Bond energy values are always positive.
What are the biggest advantages of natural gas as a fuel source? - ANS It leaves no
ash residue
It produces almost no sulfur oxides
fats are _________ at room temperature, whereas oils are ___________under the
same conditions. - ANS solids
liquids
Can sustainable energy production be achieved using combustible fuel sources? -
ANS No. Combustion must be supplemented by additional renewable energy
sources.
Why do fossil fuels not meet the criteria for sustainability? - ANS They are
nonrenewable resources
They produce undesirable waste products
Any substance that may be burned to produce heat or work is called - ANS fuel
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