knight ch19

8/4/2019 Knight Ch19

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Chapter 19


2/20

Rank in order, from largest to smallest, the workWout

performed by these four heat engines.

1. Wb > Wa > Wc > Wd

2. Wb

> Wa

> Wb

> Wc

3. Wb > Wa > Wb = Wc

4. Wd > Wa = Wb > Wc

5. Wd > Wa > Wb > Wc


3/20

Rank in order, from largest to smallest, the workWout

performed by these four heat engines.

1. Wb > Wa > Wc > Wd

2. Wb

> Wa

> Wb

> Wc

3. Wb > Wa > Wb = Wc

4. Wd > Wa = Wb > Wc

5. Wd > Wa > Wb > Wc


4/20

Its a really hot day and your air conditioner is broken.

Your roommate says, Lets open the refrigerator door and

cool this place off. Will this work?

1. Yes.

2. It might, but it will depend on how hot the room is.

3. No.


5/20

Its a really hot day and your air conditioner is broken.

Your roommate says, Lets open the refrigerator door and

cool this place off. Will this work?

1. Yes.

2. It might, but it will depend on how hot the room is.

3. No.


6/20

What is the thermal efficiency of this heat engine?

1. 0.10

2. 0.25

3. 0.50

4. 4

5. Cant tell without knowing QC.


7/20

What is the thermal efficiency of this heat engine?

1. 0.10

2. 0.25

3. 0.50

4. 4

5. Cant tell without knowing QC.


8/20

What, if anything, iswrong with this

refrigerator?

1. It violates the first law of thermodynamics.

2. It violates the second law of thermodynamics.

3. It violates the third law of thermodynamics.

4. Nothing is wrong.


9/20

What, if anything, iswrong with this

refrigerator?

1. It violates the first law of thermodynamics.

2. It violates the second law of thermodynamics.

3. It violates the third law of thermodynamics.

4. Nothing is wrong.


10/20

Could this heat engine

be built?

1. Yes.

2. No.

3. Its impossible to tell without knowingwhat kind of cycle it uses.


11/20

Could this heat engine

be built?

1. Yes.

2. No.

3. Its impossible to tell without knowingwhat kind of cycle it uses.


12/20

Chapter 19Reading Quiz


13/20

What is the generic name for a cyclical device that

transforms heat energy into work.

1. Refrigerators2. Thermal Motors

3. Heat Engines

4. Carnot Cycles

5. Otto processors


14/20

What is the generic name for a cyclical device that

transforms heat energy into work.

1. Refrigerators2. Thermal Motors

3. Heat Engines

4. Carnot Cycles

5. Otto processors


15/20

The area enclosed within a pVcurve is

1. the work done by the system during one complete

cycle.2. the work done on the system during one complete

cycle.

3. the thermal energy change of the system during

one complete cycle.

4. the heat transferred out of the system during one

complete cycle.


16/20

The area enclosed within a pVcurve is

1. the work done by the system during one

complete cycle.2. the work done on the system during one complete

cycle.

3. the thermal energy change of the system during

one complete cycle.

4. the heat transferred out of the system during one

complete cycle.


17/20

The maximum possible efficiency of a heat

engine is determined by

1. its design.2. the amount of heat that flows.

3. the maximum and minimum pressure.

4. the compression ratio.

5. the maximum and minimum temperature.


18/20

The maximum possible efficiency of a heat

engine is determined by

1. its design.2. the amount of heat that flows.

3. the maximum and minimum pressure.

4. the compression ratio.

5. the maximum and minimum temperature.


19/20

The engine with the largest possible efficiency uses a

1. Brayton cycle.

2. Joule cycle.

3. Carnot cycle.

4. Otto cycle.

5. Diesel cycle.


20/20

The engine with the largest possible efficiency uses a

1. Brayton cycle.2. Joule cycle.

3. Carnot cycle.

4. Otto cycle.

5. Diesel cycle.

knight ch19

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