Question 1

The change in internal energy of adding 100 joules to a system that does 60 joules of work is

Accepted Answer

A) 0 J. 
B) 40 J. 
C) 60 J. 
D) 100 J. 
E) none of the above 
A) 0 J. 
B) 40 J. 
C) 60 J. 
D) 100 J. 
E) none of the above

Question 2

The ideal efficiency for a heat engine operating between the temperatures 2700 K and 300 K is

Accepted Answer

A) 10%. 
B) 24%. 
C) 80%. 
D) 89%. 
E) none of the above 
A) 10%. 
B) 24%. 
C) 80%. 
D) 89%. 
E) none of the above

Question 3

Entropy measures temperature

Accepted Answer

A) at constant pressure. 
B) at constant volume. 
C) as pressure increases. 
D) all of the above 
E) none of the above 
A) at constant pressure. 
B) at constant volume. 
C) as pressure increases. 
D) all of the above 
E) none of the above

Question 4

If a 5°C piece of iron is heated until it has twice as much internal energy, its temperature will be

Accepted Answer

A) 10°C. 
B) 273°C. 
C) 278°C. 
D) 283°C. 
E) 556°C. 
A) 10°C. 
B) 273°C. 
C) 278°C. 
D) 283°C. 
E) 556°C.

Question 5

To totally convert a given amount of mechanical energy into heat is

Accepted Answer

A) possible. 
B) impossible. 
C) need more information 
D) none of the above 
A) possible. 
B) impossible. 
C) need more information 
D) none of the above

Question 6

An adiabatic process is characterized by the absence of

Accepted Answer

A) entropy. 
B) pressure change. 
C) heat exchange. 
D) temperature change. 
E) none of the above 
A) entropy. 
B) pressure change. 
C) heat exchange. 
D) temperature change. 
E) none of the above

Question 7

If you leave the refrigerator door open in a closed room, the room temperature will

Accepted Answer

A) increase. 
B) decrease. 
C) be unaffected. 
A) increase. 
B) decrease. 
C) be unaffected.

Question 8

Harry places a new air conditioner in the middle of his hot room, which when operating

Accepted Answer

A) cools the room. 
B) further warms the room. 
C) neither of these 
A) cools the room. 
B) further warms the room. 
C) neither of these

Question 9

During an adiabatic compression of an ideal gas

Accepted Answer

A) the internal energy of the gas remains constant. 
B) the temperature of the gas does not change. 
C) no heat enters or leaves the gas. 
D) no work is done on the gas. 
E) none of the above 
A) the internal energy of the gas remains constant. 
B) the temperature of the gas does not change. 
C) no heat enters or leaves the gas. 
D) no work is done on the gas. 
E) none of the above

Question 10

More efficient gasoline engines could be built if they could withstand

Accepted Answer

A) greater rotational rates. 
B) lower temperatures. 
C) higher temperatures. 
D) none of the above 
A) greater rotational rates. 
B) lower temperatures. 
C) higher temperatures. 
D) none of the above

Question 11

As a parcel of air is swept upward, with no heat input or output, its temperature

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
A) increases. 
B) decreases. 
C) remains the same.

Question 12

Which of these units of temperature is larger?

Accepted Answer

A) a Celsius degree 
B) a Kelvin 
C) both are the same size 
D) none of the above 
A) a Celsius degree 
B) a Kelvin 
C) both are the same size 
D) none of the above

Question 13

A given amount of heat energy can be completely converted to mechanical energy in

Accepted Answer

A) a steam engine. 
B) an atomic reactor. 
C) a simple machine. 
D) all of the above 
E) none of the above 
A) a steam engine. 
B) an atomic reactor. 
C) a simple machine. 
D) all of the above 
E) none of the above

Question 14

If a piece of iron and a cup of water at the same temperature are heated so the internal energy of each doubles

Accepted Answer

A) the water will have the higher temperature. 
B) the iron will have the higher temperature. 
C) both will have the same temperature. 
D) need more information 
A) the water will have the higher temperature. 
B) the iron will have the higher temperature. 
C) both will have the same temperature. 
D) need more information

Question 15

When a system does work without adding heat, the temperature of the system

Accepted Answer

A) increases. 
B) decreases. 
C) remains unchanged. 
D) none of the above 
A) increases. 
B) decreases. 
C) remains unchanged. 
D) none of the above

Question 16

The contained air in a closed, sealed can placed on a hot stove will undergo an increase in

Accepted Answer

A) internal energy. 
B) temperature. 
C) pressure. 
D) all of the above 
E) none of the above 
A) internal energy. 
B) temperature. 
C) pressure. 
D) all of the above 
E) none of the above

Question 17

When you vigorously shake a can of chicken broth, you

Accepted Answer

A) are doing work on the broth. 
B) increase the temperature of the broth. 
C) both of these 
D) neither of these 
A) are doing work on the broth. 
B) increase the temperature of the broth. 
C) both of these 
D) neither of these

Question 18

As a system becomes more disordered, entropy

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
A) increases. 
B) decreases. 
C) remains the same.

Question 19

A volume of air that is compressed with no heat entering or leaving becomes

Accepted Answer

A) cooler. 
B) remain unchanged. 
C) warmer. 
D) none of the above 
A) cooler. 
B) remain unchanged. 
C) warmer. 
D) none of the above

Question 20

In the formation of a cloud, moist air rises and

Accepted Answer

A) expands. 
B) cools. 
C) condenses. 
D) all of the above 
E) none of the above 
A) expands. 
B) cools. 
C) condenses. 
D) all of the above 
E) none of the above

Exam 18: Thermodynamics

The change in internal energy of adding 100 joules to a system that does 60 joules of work is

The ideal efficiency for a heat engine operating between the temperatures 2700 K and 300 K is

Entropy measures temperature

If a 5°C piece of iron is heated until it has twice as much internal energy, its temperature will be

To totally convert a given amount of mechanical energy into heat is

An adiabatic process is characterized by the absence of

If you leave the refrigerator door open in a closed room, the room temperature will

Harry places a new air conditioner in the middle of his hot room, which when operating

During an adiabatic compression of an ideal gas

More efficient gasoline engines could be built if they could withstand

As a parcel of air is swept upward, with no heat input or output, its temperature

Which of these units of temperature is larger?

A given amount of heat energy can be completely converted to mechanical energy in

If a piece of iron and a cup of water at the same temperature are heated so the internal energy of each doubles

When a system does work without adding heat, the temperature of the system

The contained air in a closed, sealed can placed on a hot stove will undergo an increase in

When you vigorously shake a can of chicken broth, you

As a system becomes more disordered, entropy

A volume of air that is compressed with no heat entering or leaving becomes

In the formation of a cloud, moist air rises and

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