B.4.2 Lesson 4 Thermodynamic Processes

Multiple Choice

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass
• work done
• force
• pressure

Multiple Choice

The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics
• law of heat addition
• principle of entropy
• conservation of energy

Multiple Choice

Process B on the PV diagram is an ______________ process.

• adiabatic

• isobaric

• isochoric

• isothermal

Multiple Choice

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

Multiple Choice

What does the "U" stand for the formula ∆U = Q + W

• Heat
• Temperature
• Work
• Internal energy

Multiple Choice

When applying the first law of thermodynamics to a system, when is heat a positive quantity?

• when the system does work
• when the system has work done on it
• when the system absorbs heat
• when the system loses heat
• when no work is done either on the system or by the system

Multiple Choice

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

Multiple Choice

Heating a closed, steel container is an example of an

• Adiabatic process

• Isovolumetric process

• Isothermal process

• Isobaric process

Multiple Choice

For an isovolumetric process, which of the following statements is correct?

• a. Work, heat, and internal energy all undergo changes.

• b. Work and heat balance each other, so that there is no change in internal energy.

• c. No energy is transferred as heat; internal energy change is due to work.

• d. No work is done; internal energy change is due to heat.

Multiple Choice

Symbol that indicates that energy is released.

• U

• Q

• -Q

• W

Multiple Choice

In an adiabatic process, what equals zero?

• Q

• W

• ΔU

• T

Multiple Choice

Pistons moving in a car is an example of an adiabatic process

• True

• False

Multiple Choice

In Isothermal process which property remains constant

• Volume

• Pressure

• Concentration

• Temperature

Multiple Choice

What is the name of the process in which pressure remains constant.

• Isochoric process

• Adiabatic process

• Isobaric process

• Isolated process

Multiple Choice

The picture represents a Carnot Cycle.

what type of process is A-B

• Isothermal Expansion

• Isothermal Compression

• Adiabatic Expansion

• Adiabatic Compression

Multiple Choice

The picture represents a Carnot Cycle.

what type of process is B-C

• Isothermal Expansion

• Isothermal Compression

• Adiabatic Expansion

• Adiabatic Compression

Multiple Choice

The picture represents a Carnot Cycle.

what type of process is C-D

• Isothermal Expansion

• Isothermal Compression

• Adiabatic Expansion

• Adiabatic Compression

Multiple Choice

The picture represents a Carnot Cycle.

what type of process is D-A

• Isothermal Expansion

• Isothermal Compression

• Adiabatic Expansion

• Adiabatic Compression

Multiple Choice

The picture represents a Carnot Cycle.

Which process keeps the same temperature but compresses the volume.

• A-B

• B-C

• C-D

• D-A

Multiple Choice

The picture represents a Carnot Cycle.

Which process represents partially the 1st Law of

Thermodynamic –Q=–∆V.

• A-B

• B-C

• C-D

• D-A

Multiple Choice

Which process is isobaric?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows +W?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows +∆V?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows ∆U=0?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows ∆Ek _gas=0?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows –∆V?

• A-B

• B-C

• C-A

• None

Multiple Choice

Which process shows T_B=T_C?

• A-B

• B-C

• C-A

• None

Multiple Choice

Isolated system.

The picture on the left represents:

• Negative work by the gas inside the cylinder

• Positive work by the gas inside of cylinder

• Positive work by the surroundings.

Multiple Choice

Isolated System.

The picture on the left represents:

• +∆V

• +W

• +∆P

• –∆V

• –∆P

Multiple Choice

Isolated System.

The picture on the right represents that the work is done on the gas:

• +W

• +∆P

• –W

• –∆P

Multiple Choice

What best describes an adiabatic process?

• Heat exchange occurs with the surroundings

• Heat exchange occurs within the system

• No heat exchange occurs with the surroundings

• No work is performed by the system

Explanation Slide...

An adiabatic process is one where there is no heat exchange between the system and its surroundings. This means that no heat enters or leaves the system during the process.

Multiple Choice

In an adiabatic expansion of an ideal gas, what happens to the temperature?

• Increases

• Decreases

• Remains constant

• None

Explanation Slide...

During an adiabatic expansion, the gas expands without any heat being added or removed. As the gas does work on the surroundings, it loses internal energy, leading to a decrease in temperature.

Multiple Choice

Which of the following processes is most likely to approximate an adiabatic process?

• A well-insulated gas cylinder expanding quickly

• A gas cylinder with controlled heat exchange

• A gas cylinder expanding slowly with constant heat addition

• A gas cylinder in contact with an ice bath

Explanation Slide...

A well-insulated gas cylinder expanding quickly is more likely to approximate an adiabatic process because the insulation prevents heat exchange, and the rapid expansion reduces the time available for heat transfer.