Question 1

Approximately what percentage of the chemical energy of a fossil fuel electrical power plant is "lost" as heat energy?

Accepted Answer

A)   20%
B)   40%
C)   60%
D)   80%

Question 2

Used oil from fast food restaurants can be used in making biodiesel fuel.

Accepted Answer

A) True 
 B)False

Question 3

A disadvantage of strip mining is that it leaves the soil exposed and erosion occurs more readily.

Accepted Answer

A) True 
 B)False

Question 4

The statement "you can't get something for nothing" is another way of expressing

Accepted Answer

A)   the first law of thermodynamics.
B)   the second law of thermodynamics.
C)   Boyle's law.
D)   the third law of thermodynamics.

Question 5

Which of the following statements about using ocean energy to generate electricity is NOT true?

Accepted Answer

A)   Water will drive a turbine to generate electricity when it flows out of a reservoir at low tide.
B)   Water will drive a turbine to generate electricity when it flows out of a reservoir at high tide.
C)   The difference in temperature between surface water and the ocean depths can be used to evaporate a liquid to a vapor that drives a turbine.
D)   All of the above statements are true.

Question 6

A student mixes compound A with compound B and notices that a chemical reaction occurs. The temperature of the mixture decreases. The reaction is ________.

Accepted Answer

The answer of A student mixes compound A with compound...

Question 7

Which of the following does NOT result in an increase in entropy?

Accepted Answer

A)   Water boils.
B)   A child scatters her toys.
C)   A student cleans his dorm room.
D)   A hose sprays water.

Question 8

In 2010, approximately 60% of the natural gas in the United States was produced by the hydraulic fracturing (fracking) method.

Accepted Answer

A) True 
 B)False

Question 9

Is coal being formed today? Is this a solution to our energy concerns?

Accepted Answer

However, the rate at which coal is bein...

Question 10

Nuclear power plants generate large amounts of air pollution.

Accepted Answer

A) True 
 B)False

Question 11

How many joules of energy will a stock tank heater rated at 400 watts use in a 48 hour period?

Accepted Answer

A)   400
B)   400 × 48 × 60
C)   400 × 3600
D)   400 × 48 × 3600

Question 12

The first fuels were plant materials.

Accepted Answer

A) True 
 B)False

Question 13

Pure isooctane would have an octane rating of

Accepted Answer

A)   0.
B)   50.
C)   75.
D)   100.

Question 14

A substance that burns readily and releases significant amounts of energy is a(n)

Accepted Answer

A)   reducing agent.
B)   fuel.
C)   endotherm.
D)   catalyst.

Question 15

Fuel cells are more efficient in converting chemical energy to electricity than internal combustion engines are.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is NOT a fossil fuel?

Accepted Answer

A)   coal
B)   natural gas
C)   petroleum
D)   wood

Question 17

The density of coal is higher than the density of most of its impurities.

Accepted Answer

A) True 
 B)False

Question 18

A major inconvenience of coal as a fuel is that it is a(n)

Accepted Answer

A)   solid.
B)   liquid.
C)   gas.
D)   mixture of all three states.

Question 19

Wood, crop residues, and ________ still remain the main sources of heat for one-third of the world's people.

Accepted Answer

A)   coal.
B)   natural gas
C)   petroleum
D)   dried dung

Question 20

When coal burns,

Accepted Answer

A)   chemical energy is converted to heat energy.
B)   heat energy is created.
C)   chemical energy is destroyed.
D)   heat energy is converted to electrical energy.

Exam 15: Energy

The statement "you can't get something for nothing" is another way of expressing

Correct AnswerverifiedShow Answer

Wood, crop residues, and ________ still remain the main sources of heat for one-third of the world's people.

Correct AnswerverifiedShow Answer

In 2010, approximately 60% of the natural gas in the United States was produced by the hydraulic fracturing (fracking) method.

Correct AnswerverifiedShow Answer

Approximately what percentage of the chemical energy of a fossil fuel electrical power plant is "lost" as heat energy?

Correct AnswerverifiedShow Answer

Which of the following statements about using ocean energy to generate electricity is NOT true?

Correct AnswerverifiedShow Answer

A substance that burns readily and releases significant amounts of energy is a(n)

Correct AnswerverifiedShow Answer

A disadvantage of strip mining is that it leaves the soil exposed and erosion occurs more readily.

Correct AnswerverifiedShow Answer

Pure isooctane would have an octane rating of

Correct AnswerverifiedShow Answer

When coal burns,

Correct AnswerverifiedShow Answer

The density of coal is higher than the density of most of its impurities.

Correct AnswerverifiedShow Answer

A student mixes compound A with compound B and notices that a chemical reaction occurs. The temperature of the mixture decreases. The reaction is ________.

Correct AnswerverifiedShow Answer

How many joules of energy will a stock tank heater rated at 400 watts use in a 48 hour period?

Correct AnswerverifiedShow Answer

Fuel cells are more efficient in converting chemical energy to electricity than internal combustion engines are.

Correct AnswerverifiedShow Answer

The first fuels were plant materials.

Correct AnswerverifiedShow Answer

Is coal being formed today? Is this a solution to our energy concerns?

Correct AnswerAnswered by ExamLex AIHowever, the rate at which coal is bein...View AnswerShow Answer

Used oil from fast food restaurants can be used in making biodiesel fuel.

Correct AnswerverifiedShow Answer

Which of the following does NOT result in an increase in entropy?

Correct AnswerverifiedShow Answer

Which of the following is NOT a fossil fuel?

Correct AnswerverifiedShow Answer

Nuclear power plants generate large amounts of air pollution.

Correct AnswerverifiedShow Answer

A major inconvenience of coal as a fuel is that it is a(n)

Correct AnswerverifiedShow Answer

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Answered by ExamLex AI

However, the rate at which coal is bein...
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