Thermodynamic Systems and Properties: Interactive Learning Quizzes

Question 1

Which of the following is NOT a thermodynamic property?

Accepted Answer

Work

Answer

Temperature

Answer

Pressure

Answer

Entropy

Question 2

Which of the following is a state variable?

Accepted Answer

Pressure

Answer

Heat

Answer

Time

Answer

Work

Question 3

The specific volume of a substance refers to:

Accepted Answer

Volume per unit mass

Answer

Mass per unit volume

Answer

Pressure per unit volume

Answer

Temperature per unit volume

Question 4

An isothermal process is one in which the:

Accepted Answer

Temperature remains constant

Answer

Pressure remains constant

Answer

Volume remains constant

Answer

Entropy remains constant

Question 5

The change in entropy of a system during a reversible process is:

Accepted Answer

Equal to the heat transferred divided by the temperature

Answer

Always greater than the heat transferred divided by the temperature

Answer

Always less than the heat transferred divided by the temperature

Answer

Zero

Question 6

Which of the following is NOT a thermodynamic property of a pure substance?

Accepted Answer

Bulk modulus

Answer

Specific heat capacity

Answer

Enthalpy

Answer

Gibbs free energy

Question 7

A system undergoing a heat transfer process:

Accepted Answer

Must have a temperature difference

Answer

Must have a mass transfer

Answer

Must have a work transfer

Answer

Must have an entropy change

Question 8

The first law of thermodynamics:

Accepted Answer

Describes the conservation of energy

Answer

Describes the increase of entropy

Answer

Defines the state variables

Answer

Predicts the direction of spontaneous processes

Question 9

A piston-cylinder system undergoes a reversible, isothermal process. What is the relationship between heat transfer and work done?

Accepted Answer

Heat transfer equals work done

Answer

Heat transfer is greater than work done

Answer

Work done is greater than heat transfer

Answer

Heat transfer and work done are unrelated

Question 10

Which of the following represents an isochoric process?

Accepted Answer

Constant volume

Answer

Constant pressure

Answer

Constant temperature

Answer

Adiabatic

Question 11

The latent heat of a substance is the:

Accepted Answer

Heat required to change its phase without a change in temperature

Answer

Heat required to raise its temperature by 1 K

Answer

Heat released when it undergoes a chemical reaction

Answer

Heat absorbed when it does work on its surroundings

Question 12

Which of the following units is commonly used to measure energy?

Accepted Answer

Joules

Answer

Newtons

Answer

Watts

Answer

Pascals

Question 13

The Carnot cycle is a theoretical model of a:

Accepted Answer

Heat engine that operates at maximum efficiency

Answer

Refrigerator that operates at maximum efficiency

Answer

Heat pump that operates at maximum efficiency

Answer

Power plant that operates at maximum efficiency

Question 14

Which of the following is NOT a thermodynamic system?

Accepted Answer

A vacuum with no mass or volume

Answer

A closed system with fixed mass and volume

Answer

An open system where mass can enter and leave

Answer

An isolated system with no interaction with the surroundings

Question 15

What is the state of a system if all its properties remain constant over time?

Accepted Answer

Equilibrium

Answer

Non-equilibrium

Answer

Steady-state

Answer

Transient

Question 16

Which of the following statements accurately describes the first law of thermodynamics?

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed

Answer

Entropy always increases in any closed system

Answer

The total energy of the universe remains constant

Answer

Heat always flows from a hotter to a colder body

Question 17

Which thermodynamic process involves no heat transfer between the system and its surroundings?

Accepted Answer

Adiabatic

Answer

Isothermal

Answer

Isobaric

Answer

Isochoric

Question 18

What is the SI unit of entropy?

Accepted Answer

Joules per Kelvin

Answer

Joules

Answer

Kelvin

Answer

Watts

Question 19

What is the significance of the zeroth law of thermodynamics?

Accepted Answer

It establishes thermal equilibrium, allowing us to compare temperatures

Answer

It defines the concept of temperature

Answer

It describes the direction of heat flow

Answer

It predicts the behavior of ideal gases

Question 20

Which of the following systems has fixed mass and volume and can only exchange energy with its surroundings through work?

Accepted Answer

A piston-cylinder system with a movable piston

Answer

A turbine that extracts energy from a flowing fluid

Answer

A heat exchanger that transfers heat between two fluids

Answer

A condenser that condenses a vapor into a liquid

Question 21

What is the fundamental difference between heat and work?

Accepted Answer

Heat is a form of energy transfer due to a temperature difference, while work is a force acting through a distance

Answer

Work is a form of energy transfer due to a temperature difference, while heat is a force acting through a distance

Answer

Heat and work are both forms of energy transfer due to a temperature difference

Answer

Heat and work are both forces acting through a distance

Question 22

How does entropy change contribute to predicting the direction and spontaneity of thermodynamic processes?

Accepted Answer

A positive entropy change indicates spontaneous processes, while a negative change indicates non-spontaneous processes.

Answer

Entropy change is irrelevant in predicting process direction.

Answer

Entropy change only affects irreversible processes.

Question 23

What is the physical meaning of specific internal energy?

Accepted Answer

It represents the energy stored per unit mass of a system.

Answer

It indicates the work done by a system.

Answer

It represents the heat transferred to a system.

Question 24

Which of the following is NOT a fundamental property of a thermodynamic system?

Accepted Answer

Entropy generation

Answer

Pressure

Answer

Temperature

Answer

Volume

Question 25

A closed system is one that...

Accepted Answer

Exchanges energy but not mass with its surroundings.

Answer

Exchanges both mass and energy with its surroundings.

Answer

Exchanges mass but not energy with its surroundings.

Question 26

In an isothermal process, which quantity remains constant?

Accepted Answer

Temperature

Answer

Pressure

Answer

Entropy

Answer

Volume

Question 27

The first law of thermodynamics states that...

Accepted Answer

Energy can neither be created nor destroyed.

Answer

Entropy always increases.

Answer

Momentum is conserved in all processes.

Answer

Mass is conserved in closed systems.

Question 28

The specific heat of a substance is defined as...

Accepted Answer

The amount of heat required to raise the temperature of one unit mass of the substance by one degree.

Answer

The amount of heat required to vaporize one unit mass of the substance.

Question 29

Entropy is a measure of...

Accepted Answer

The disorder or randomness of a thermodynamic system.

Answer

The amount of heat energy in a system.

Answer

The volume occupied by a system.

Question 30

The efficiency of a heat engine is calculated as...

Accepted Answer

The ratio of the work output to the heat input.

Answer

The ratio of the heat input to the work output.

Answer

The difference between the heat input and the work output.

Question 31

A system undergoes a process in which its volume decreases while its pressure remains constant. Which of the following is true about the work done by the system?

Accepted Answer

Negative

Answer

Cannot be determined without more information

Answer

Positive

Answer

Zero

Question 32

Which of the following is the SI unit of specific heat capacity?

Accepted Answer

J/kg·K

Answer

Wh/lb·°F

Answer

cal/g·°C

Answer

kJ/mol·K

Question 33

The second law of thermodynamics states that:

Accepted Answer

Entropy increases in isolated systems

Answer

The universe is expanding

Answer

Heat cannot flow spontaneously from a colder to a hotter body

Answer

Energy is conserved

Question 34

Which of the following systems cannot exchange both mass and energy with its surroundings?

Accepted Answer

Isolated

Answer

Adiabatic

Answer

Open

Answer

Closed

Question 35

The specific entropy of a substance is defined as:

Accepted Answer

s = dh/dT

Answer

h = u - Tv

Answer

h = g - RT

Answer

h = s - vP

Question 36

Which of the following processes is characterized by a constant volume?

Accepted Answer

Isochoric

Answer

Adiabatic

Answer

Isothermal

Answer

Isobaric

Question 37

Which of the following is NOT a type of thermodynamic system?

Accepted Answer

Cyclic

Answer

Closed

Answer

Isolated

Answer

Open

Question 38

Which of the following is a state variable?

Accepted Answer

Temperature

Answer

Heat

Answer

Mass

Answer

Work

Question 39

A system undergoes a process where its volume remains constant. This process is known as:

Accepted Answer

Isochoric

Answer

Isothermal

Answer

Adiabatic

Answer

Isobaric

Question 40

The first law of thermodynamics states that:

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Answer

Heat flows from high to low temperature.

Answer

The entropy of an isolated system always increases.

Answer

The total entropy of the universe is constant.

Question 41

A piston-cylinder system contains a gas. If the piston is moved slowly, the process is considered:

Accepted Answer

Quasi-static

Answer

Adiabatic

Answer

Isothermal

Answer

Isochoric

Question 42

The specific heat capacity of a substance is defined as:

Accepted Answer

The amount of heat required to raise the temperature of 1 kg of the substance by 1 K.

Answer

The rate at which heat is transferred into or out of a substance.

Answer

The temperature at which a substance undergoes a phase change.

Question 43

Which of the following is a dimensionless property?

Accepted Answer

Specific gravity

Answer

Enthalpy

Answer

Entropy

Answer

Density

Question 44

The property that measures the disorder or randomness of a system is:

Accepted Answer

Entropy

Answer

Gibbs free energy

Answer

Internal energy

Answer

Enthalpy

Question 45

A rigid tank containing a gas at 200 kPa has its volume doubled while maintaining a constant temperature. What is the final pressure of the gas?

Accepted Answer

100 kPa

Answer

200 kPa

Answer

50 kPa

Answer

400 kPa

Question 46

Which of the following is NOT a property of a thermodynamic system?

Accepted Answer

Heat

Answer

Temperature

Answer

Volume

Answer

Pressure

Question 47

A system experiences a decrease of 500 kJ in its internal energy while performing 200 kJ of work on its surroundings. What is the heat transfer involved in this process?

Accepted Answer

-700 kJ

Answer

300 kJ

Answer

700 kJ

Answer

-300 kJ

Question 48

What type of thermodynamic system allows for the exchange of both energy and mass with its surroundings?

Accepted Answer

Open system

Answer

Adiabatic system

Answer

Isolated system

Answer

Closed system

Question 49

Which of these is an intensive property?

Accepted Answer

Density

Answer

Volume

Answer

Mass

Answer

Energy

Question 50

A system is in thermodynamic equilibrium when it is in:

Accepted Answer

Thermal, mechanical, and chemical equilibrium

Answer

Thermal equilibrium only

Answer

Thermal and mechanical equilibrium only

Answer

Mechanical and chemical equilibrium only

Question 51

What is the specific enthalpy of a substance defined as?

Accepted Answer

Enthalpy per unit mass

Answer

Enthalpy per unit volume

Answer

Enthalpy change at constant pressure

Answer

Enthalpy change at constant temperature

Question 52

The Zeroth Law of Thermodynamics is the foundation for measuring:

Accepted Answer

Temperature

Answer

Pressure

Answer

Internal Energy

Answer

Volume

Question 53

A process where the pressure of the system remains constant is called:

Accepted Answer

Isobaric

Answer

Isothermal

Answer

Isochoric

Answer

Adiabatic

Question 54

According to the state postulate, the state of a simple compressible system is completely defined by:

Accepted Answer

Two independent, intensive properties

Answer

Two independent, extensive properties

Answer

One intensive and one extensive property

Answer

The amount of heat and work interactions