Question 1

The filling of a hot apple pie is hotter than the crust due to

Accepted Answer

A)  water in the filling that better retains thermal energy.
B)  uneven temperatures.
C)  high conductivity of apples.

Question 2

Heat is thermal energy that flows due to

Accepted Answer

A)  molecular activity.
B)  calorie imbalance.
C)  temperature differences.

Question 3

As entropy in a system increases, energy within the system

Accepted Answer

A)  becomes more ordered.
B)  becomes less ordered.
C)  reaches equilibrium.
D)  moves toward destruction.

Question 4

Which of the following contracts most when the temperature is slightly increased? Equal volumes of

Accepted Answer

A)  iron.
B)  wood.
C)  ice water.
D)  helium.
E)  none of the above contract when heated

Question 5

As a hot iron ring cools, the diameter of the hole

Accepted Answer

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

Question 6

Consider a sample of water at 20°C. If the temperature is slightly increased, the water

Accepted Answer

A)  expands.
B)  contracts.
C)  remains the same. A

Question 7

A volume of helium gas has a temperature of 10°C. The same gas twice as hot has a temperature of

Accepted Answer

A)  10°C.
B)  12°C.
C)  283°C.
D)  293°C.
E)  none of the above D

Question 8

Your room gets messier day by day. In this case entropy is

Accepted Answer

A)  increasing.
B)  decreasing.
C)  hanging steady.
D)  none of the above

Question 9

Compared to a giant iceberg, a hot cup of coffee has

Accepted Answer

A)  more thermal energy and higher temperature.
B)  higher temperature, but less thermal energy.
C)  a greater specific heat capacity and more thermal energy.
D)  none of the above

Question 10

Thermal energy can be measured in

Accepted Answer

A)  calories.
B)  Calories.
C)  joules.
D)  any or all of the above for special cases

Question 11

When a bimetallic bar composed of copper and iron strips is heated, the bar bends toward the iron strip because

Accepted Answer

A)  iron gets hotter before copper.
B)  copper gets hotter before iron.
C)  copper expands more than iron.
D)  iron expands more than copper.
E)  none of the above

Question 12

For each degree a volume of air at 0°C is cooled, its pressure

Accepted Answer

A)  decreases by 1/273.
B)  decreases by 100/273.
C)  increases by 1/273.
D)  increases by 100/273.

Question 13

Suppose you rapidly stir some raw eggs with an egg beater. The temperature of the eggs will

Accepted Answer

A)  increase.
B)  decrease.
C)  remain unchanged.

Question 14

If the temperature of a sample of 4°C water slightly increases, the sample of water

Accepted Answer

A)  contracts.
B)  expands.
C)  neither

Question 15

When an iron ring is heated, the hole becomes

Accepted Answer

A)  smaller.
B)  larger.
C)  neither

Question 16

Place a 1-kg iron block at 40°C into 1 kg of water at 20°C and the final temperature becomes

Accepted Answer

A)  less than 30°C.
B)  at or about 30°C.
C)  more than 30°C. A

Question 17

What would be the temperature of 50 g of 20°C water mixed with 80 g of 40°C water?

Accepted Answer

A)  24.6°C
B)  26.9°C
C)  27.6°C
D)  28.3°C

Question 18

The greatest expansion of water occurs when

Accepted Answer

A)  it turns to ice.
B)  at 4°C it gains temperature.
C)  at 4°C it loses temperature.
D)  none of the above

Question 19

The usefulness of a bimetallic strip is due to differences in

Accepted Answer

A)  expansions of metals.
B)  conductivities of metals.
C)  heat capacities of metals.

Question 20

Which law of thermodynamics addresses the direction of heat flow?

Accepted Answer

A)  first law
B)  second law
C)  third law
D)  all of the above

Exam 6: Thermal Energy and Thermodynamics

The filling of a hot apple pie is hotter than the crust due to

Correct AnswerverifiedShow Answer

Heat is thermal energy that flows due to

Correct AnswerverifiedShow Answer

As entropy in a system increases, energy within the system

Correct AnswerverifiedShow Answer

Which of the following contracts most when the temperature is slightly increased? Equal volumes of

Correct AnswerverifiedShow Answer

As a hot iron ring cools, the diameter of the hole

Correct AnswerverifiedShow Answer

Consider a sample of water at 20°C. If the temperature is slightly increased, the water

Correct AnswerverifiedA

A volume of helium gas has a temperature of 10°C. The same gas twice as hot has a temperature of

Correct AnswerverifiedD

Your room gets messier day by day. In this case entropy is

Correct AnswerverifiedShow Answer

Compared to a giant iceberg, a hot cup of coffee has

Correct AnswerverifiedShow Answer

Thermal energy can be measured in

Correct AnswerverifiedShow Answer

When a bimetallic bar composed of copper and iron strips is heated, the bar bends toward the iron strip because

Correct AnswerverifiedShow Answer

For each degree a volume of air at 0°C is cooled, its pressure

Correct AnswerverifiedShow Answer

Suppose you rapidly stir some raw eggs with an egg beater. The temperature of the eggs will

Correct AnswerverifiedShow Answer

If the temperature of a sample of 4°C water slightly increases, the sample of water

Correct AnswerverifiedShow Answer

When an iron ring is heated, the hole becomes

Correct AnswerverifiedShow Answer

Place a 1-kg iron block at 40°C into 1 kg of water at 20°C and the final temperature becomes

Correct AnswerverifiedA

What would be the temperature of 50 g of 20°C water mixed with 80 g of 40°C water?

Correct AnswerverifiedShow Answer

The greatest expansion of water occurs when

Correct AnswerverifiedShow Answer

The usefulness of a bimetallic strip is due to differences in

Correct AnswerverifiedShow Answer

Which law of thermodynamics addresses the direction of heat flow?

Correct AnswerverifiedShow Answer

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D

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A

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