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Fundamentals of Thermodynamics

Physics

A collection of factual questions covering the core principles, laws, and physical constants of thermodynamics.

thermodynamics physics science

15 Questions Medium Ages 14+ Jul 24, 2026

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About this Study Set

This study set covers Physics through 15 practice questions. A collection of factual questions covering the core principles, laws, and physical constants of thermodynamics. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What does the Zeroth Law of Thermodynamics establish?

A The conservation of energy
B The concept of temperature
C The impossibility of absolute zero
D The increase of entropy

2 Which thermodynamic property represents the measure of disorder or randomness in a system?

A Enthalpy
B Internal energy
C Entropy
D Gibbs free energy

3 What is the value of absolute zero in degrees Celsius?

A -273.15 °C
B -100.00 °C
C 0.00 °C
D -373.15 °C

4 The First Law of Thermodynamics is a specific statement of which universal principle?

A Conservation of momentum
B Conservation of mass
C Conservation of charge
D Conservation of energy

5 In a reversible adiabatic process, which thermodynamic property remains constant?

A Pressure
B Temperature
C Entropy
D Volume

6 Which thermodynamic potential is minimized when a system is at constant temperature and pressure?

A Helmholtz free energy
B Gibbs free energy
C Enthalpy
D Internal energy

7 What is the SI unit for measuring heat or thermal energy?

A Watt
B Joule
C Pascal
D Kelvin

8 According to the Third Law of Thermodynamics, what happens to the entropy of a perfect crystal as temperature approaches absolute zero?

A It becomes infinite
B It reaches a minimum constant value
C It becomes zero
D It increases linearly

9 Which gas law describes the relationship between pressure, volume, and temperature for an ideal gas?

A Boyle's Law
B Charles's Law
C Dalton's Law
D Ideal Gas Law

10 What is the term for a process that occurs without the transfer of heat into or out of the system?

A Isothermal
B Isobaric
C Adiabatic
D Isochoric

11 Which property of a substance is defined as the amount of heat required to raise the temperature of one gram by one degree Celsius?

A Latent heat
B Specific heat capacity
C Thermal conductivity
D Enthalpy of fusion

12 Which phase change process involves a substance changing directly from a solid to a gas?

A Condensation
B Evaporation
C Sublimation
D Deposition

13 The efficiency of a Carnot engine depends exclusively on which variables?

A The working substance
B The temperature of the two reservoirs
C The engine size
D The pressure of the intake

14 What does an isobaric process imply in a thermodynamic system?

A Constant temperature
B Constant volume
C Constant pressure
D Constant entropy

15 Which statement best describes the Kelvin-Planck formulation of the Second Law of Thermodynamics?

A Energy cannot be created or destroyed.
B Heat cannot be fully converted into work in a cycle.
C Entropy of a system always decreases in a closed cycle.
D Temperature reaches equilibrium in an isolated system.

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