Physics: Trivia Questions On The Laws Of Thermodynamics

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Physics: Trivia Questions On The Laws Of Thermodynamics - Quiz

Thermodynamics is a branch of science which primarily focuses on the relations between heat and various other forms of energy, such as mechanical, chemical or electrical energy, and therefore the relationships between all forms of energy. What do you know about the scientific study?


Questions and Answers
  • 1. 
    In an isothermal process, there is no change in
    • A. 

      Pressure.

    • B. 

      Temperature.

    • C. 

      Volume.

    • D. 

      Heat.

  • 2. 
    When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isothermal process,
    • A. 

      ΔU = 0

    • B. 

      W = 0

    • C. 

      Q = 0

    • D. 

      None of the above

  • 3. 
    A gas is expanded to twice its original volume with no change in its temperature. This process is
    • A. 

      Isothermal.

    • B. 

      Isochoric.

    • C. 

      Isobaric.

    • D. 

      Adiabatic.

  • 4. 
    An ideal gas is compressed isothermally from 30 L to 20 L. During this process, 6.0 J of energy is expended by the external mechanism that compressed the gas. What is the change of internal energy for this gas?
    • A. 

      6.0 J

    • B. 

      Zero

    • C. 

      -6.0 J

    • D. 

      None of the above

  • 5. 
    An ideal gas is compressed to one-half its original volume during an isothermal process. The final pressure of the gas
    • A. 

      Increases to twice its original value.

    • B. 

      Increases to less than twice its original value.

    • C. 

      Increases to more than twice its original value.

    • D. 

      Does not change.

  • 6. 
    An ideal gas is expanded isothermally from 20 L to 30 L. During this process, 6 J of energy is expended by the external mechanism that expanded the gas. Which of the following statements is correct?
    • A. 

      6 J of energy flow from surroundings into the gas.

    • B. 

      6 J of energy flow from the gas into the surroundings.

    • C. 

      No energy flows into or from the gas since this process is isothermal.

    • D. 

      None of the above statements is correct.

  • 7. 
    A gas is quickly compressed in an isolated environment. During the event, the gas exchanged no heat with its surroundings. This process is
    • A. 

      Isothermal.

    • B. 

      Isochoric.

    • C. 

      Isobaric.

    • D. 

      Adiabatic.

  • 8. 
    When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an adiabatic process,
    • A. 

      ΔU = 0.

    • B. 

      W = 0.

    • C. 

      Q = 0.

    • D. 

      None of the above

  • 9. 
    A monatomic ideal gas is compressed to one-half its original volume during an adiabatic process. The final pressure of the gas
    • A. 

      Increases to twice its original value.

    • B. 

      Increases to less than twice its original value.

    • C. 

      Increases to more than twice its original value.

    • D. 

      Does not change.

  • 10. 
    Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end. Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater temperature increase?
    • A. 

      The O2

    • B. 

      The He

    • C. 

      Neither; both will show the same increase.

    • D. 

      It's impossible to tell from the information given.

  • 11. 
    Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end. Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater pressure increase?
    • A. 

      The O2

    • B. 

      The He

    • C. 

      Neither; both will show the same increase.

    • D. 

      It's impossible to tell from the information given.

  • 12. 
    In an isobaric process, there is no change in
    • A. 

      Pressure.

    • B. 

      Temperature.

    • C. 

      Volume.

    • D. 

      Internal energy.

  • 13. 
    When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isobaric process,
    • A. 

      ΔU = 0.

    • B. 

      W = 0.

    • C. 

      Q = 0.

    • D. 

      None of the above

  • 14. 
    A gas is allowed to expand at constant pressure as heat is added to it. This process is
    • A. 

      Isothermal.

    • B. 

      Isochoric.

    • C. 

      Isobaric.

    • D. 

      Adiabatic.

  • 15. 
    Ten joules of heat energy are transferred to a sample of ideal gas at constant pressure. As a result, the internal energy of the gas
    • A. 

      Increases by 10 J.

    • B. 

      Increases by less than 10 J.

    • C. 

      Increases by more than 10 J.

    • D. 

      Remains unchanged.

  • 16. 
    In an isochoric process, there is no change in
    • A. 

      Pressure.

    • B. 

      Temperature.

    • C. 

      Volume.

    • D. 

      Internal energy.

  • 17. 
    When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isochoric process,
    • A. 

      ΔU = 0.

    • B. 

      W = 0.

    • C. 

      Q = 0.

    • D. 

      None of the above

  • 18. 
    A gas is confined to a rigid container that cannot expand as heat energy is added to it. This process is
    • A. 

      Isothermal.

    • B. 

      Isochoric.

    • C. 

      Isobaric.

    • D. 

      Adiabatic.

  • 19. 
    Ten joules of heat energy are transferred to a sample of ideal gas at constant volume. As a result, the internal energy of the gas
    • A. 

      Increases by 10 J.

    • B. 

      Increases by less than 10 J.

    • C. 

      Increases by more than 10 J.

    • D. 

      Remains unchanged.

  • 20. 
    Is it possible to transfer heat from a hot reservoir to a cold reservoir?
    • A. 

      No.

    • B. 

      Yes; this will happen naturally.

    • C. 

      Yes, but work will have to be done.

    • D. 

      Theoretically yes, but it hasn't been accomplished yet.

  • 21. 
    Is it possible to transfer heat from a cold reservoir to a hot reservoir?
    • A. 

      No.

    • B. 

      Yes; this will happen naturally.

    • C. 

      Yes, but work will have to be done.

    • D. 

      Theoretically yes, but it hasn't been accomplished yet.

  • 22. 
    The efficiency of a heat engine is defined as the ratio of
    • A. 

      The heat input at the high temperature to the heat output at the low temperature.

    • B. 

      The heat output at the low temperature to the heat input at the high temperature.

    • C. 

      The work it does to the heat input at the high temperature.

    • D. 

      The work it does to the heat output at the low temperature.

  • 23. 
    If the theoretical efficiency of a Carnot engine is to be 100%, the heat sink must be
    • A. 

      At absolute zero.

    • B. 

      At 0°C.

    • C. 

      At 100°C.

    • D. 

      Infinitely hot.

  • 24. 
    A Carnot cycle consists of
    • A. 

      Two adiabats and two isobars.

    • B. 

      Two isobars and two isotherms.

    • C. 

      Two isotherms and two isomets.

    • D. 

      Two adiabats and two isotherms.

  • 25. 
    The coefficient of performance (COP) of a refrigerator is defined as the ratio of
    • A. 

      The heat removed from the inside to the heat expelled to the outside.

    • B. 

      The heat expelled to the outside to the heat removed from the inside.

    • C. 

      The heat removed from the inside to the work done to remove the heat.

    • D. 

      The heat expelled to the outside to the work done to remove the heat.

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