Food Engineering THERMODYNAMICS Chapter 1 Quiz
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Questions and Answers

What is the internal energy change (∆𝑈) in an adiabatic process where work is done by the system?

  • Positive
  • Negative (correct)
  • Zero
  • Depends on the specific conditions
  • According to the first law of thermodynamics, what is the result of no heat transfer and no work done in an isolated system?

  • Internal energy decreases
  • Internal energy remains constant (correct)
  • Internal energy increases
  • Internal energy changes
  • What does the second law of thermodynamics state about the conversion of heat absorbed by the system into work?

  • It can be achieved with perfect efficiency
  • It is always possible
  • It depends on the specific conditions
  • It is never possible (correct)
  • What is the direction of natural flow according to the second law of thermodynamics?

    <p>From higher energy value to lower energy value</p> Signup and view all the answers

    What is the unit for entropy (S) according to the second law of thermodynamics?

    <p>J/K</p> Signup and view all the answers

    In an isovolumetric process, what is the change in internal energy of the system?

    <p>Internal energy remains constant</p> Signup and view all the answers

    What is the primary outcome of an isothermal process?

    <p>No change in internal energy</p> Signup and view all the answers

    Which form of energy is conserved according to the First Law of Thermodynamics?

    <p>Total energy</p> Signup and view all the answers

    What happens to the internal energy of a system if no heat is transferred and no work is done on or by the system?

    <p>Internal energy remains constant</p> Signup and view all the answers

    What is the relationship between heat (Q) and work (W) in an isothermal process?

    <p>Q = W</p> Signup and view all the answers

    The first law of thermodynamics states that the total energy of various forms in a system remains constant.

    <p>True</p> Signup and view all the answers

    In an isovolumetric process, no work is done on or by the system.

    <p>True</p> Signup and view all the answers

    In an isothermal process, there is no change in internal energy of the system.

    <p>True</p> Signup and view all the answers

    The first law of thermodynamics implies that any change in internal energy must be the result of heat transfer in or out.

    <p>True</p> Signup and view all the answers

    In an adiabatic process where work is done by the system, the internal energy change (∆𝑈) is always positive.

    <p>False</p> Signup and view all the answers

    In an adiabatic process, the internal energy of the system changes as a result of doing work on its surroundings.

    <p>True</p> Signup and view all the answers

    According to the first law of thermodynamics, an isolated system has no change in internal energy if there is no heat transfer and no work done.

    <p>True</p> Signup and view all the answers

    The Second Law of Thermodynamics states that for any process, the natural flow is always from lower energy value to higher energy value.

    <p>False</p> Signup and view all the answers

    The second law of thermodynamics states that no process is possible in which heat is transferred solely from a higher to a lower temperature.

    <p>True</p> Signup and view all the answers

    For every real-world process, there will always be losses, which aligns with the statement 'Perfect is impossible' according to the second law of thermodynamics.

    <p>True</p> Signup and view all the answers

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