Question 1

In an isolated system, entropy

Accepted Answer

A) cannot decrease. 
B) must remain constant. 
C) cannot increase. 
D) may increase, decrease, or remain constant. 
A) cannot decrease. 
B) must remain constant. 
C) cannot increase. 
D) may increase, decrease, or remain constant.

Question 2

Steam at 100$\circ$C is more dangerous than the same mass of water at 100$\circ$C because the steam

Accepted Answer

A) is less dense. 
B) moves faster. 
C) has a higher specific heat. 
D) releases a great deal of heat when it condenses. 
A) is less dense. 
B) moves faster. 
C) has a higher specific heat. 
D) releases a great deal of heat when it condenses.

Question 3

The maximum possible efficiency of a heat engine

Accepted Answer

A) is 100%. 
B) depends on the intake temperature. 
C) depends on the difference between the exhaust and intake temperatures. 
D) depends on the ratio between the exhaust and intake temperatures. 
A) is 100%. 
B) depends on the intake temperature. 
C) depends on the difference between the exhaust and intake temperatures. 
D) depends on the ratio between the exhaust and intake temperatures.

Question 4

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K.The work that the engine does per second is

Accepted Answer

A) 2 kJ. 
B) 2.5 kJ. 
C) 8 kJ. 
D) 10 kJ. 
A) 2 kJ. 
B) 2.5 kJ. 
C) 8 kJ. 
D) 10 kJ.

Question 5

Which of the following is not true of molecular motion in a gas?

Accepted Answer

A) There is no order in the motion. 
B) There is no uniformity of speed or direction. 
C) There is a definite average speed at a given temperature. 
D) There is a definite average direction of motion at a given temperature. 
A) There is no order in the motion. 
B) There is no uniformity of speed or direction. 
C) There is a definite average speed at a given temperature. 
D) There is a definite average direction of motion at a given temperature.

Question 6

When heat is added to a body of matter, the resulting temperature increase does not depend upon

Accepted Answer

A) its mass. 
B) its shape. 
C) what kind of material it consists of. 
D) whether it is in the solid, liquid, or gaseous state. 
A) its mass. 
B) its shape. 
C) what kind of material it consists of. 
D) whether it is in the solid, liquid, or gaseous state.

In an isolated system, entropy

Steam at 100^$\circ$C is more dangerous than the same mass of water at 100^$\circ$C because the steam

The maximum possible efficiency of a heat engine

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K.The work that the engine does per second is

Which of the following is not true of molecular motion in a gas?

When heat is added to a body of matter, the resulting temperature increase does not depend upon

The Scientific Method

Motion

Energy

Energy and the Future

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe

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Exam 5: Matter and Heat

In an isolated system, entropy

Steam at 100 ∘\circ∘ C is more dangerous than the same mass of water at 100 ∘\circ∘ C because the steam

The maximum possible efficiency of a heat engine

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K.The work that the engine does per second is

Which of the following is not true of molecular motion in a gas?

When heat is added to a body of matter, the resulting temperature increase does not depend upon

The Scientific Method

Motion

Energy

Energy and the Future

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe

Filters

Steam at 100^$\circ$C is more dangerous than the same mass of water at 100^$\circ$C because the steam