First Law of Thermodynamics
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Questions and Answers

What does the first law of thermodynamics provide information about?

  • The direction of spontaneous heat transfer
  • The energy balance during a change of state or process (correct)
  • The probability of various thermodynamic processes
  • The difference between heat and temperature
  • According to the first law, what would happen to the energy gained by one end of a metallic bar if it spontaneously became warmer?

  • It would be lost by the other end (correct)
  • It would be transferred to the surroundings
  • It would be stored in the bar
  • It would be converted to another form of energy
  • What does the second law of thermodynamics provide?

  • A description of the direction of spontaneous heat transfer
  • A measure of the energy balance in a system
  • A criterion for the probability of various processes (correct)
  • A definition of temperature and heat
  • What is not addressed by the first law of thermodynamics?

    <p>The feasibility of a thermodynamic process</p> Signup and view all the answers

    What would happen to the temperature of a metallic bar if it spontaneously became warmer at one end and cooler at the other?

    <p>The temperature would decrease at one end and increase at the other</p> Signup and view all the answers

    Study Notes

    Laws of Thermodynamics

    • The First Law of Thermodynamics states that energy balance is maintained during a change of state or thermodynamic process, but does not indicate feasibility of the process.
    • The First Law only states that if a process occurs, energy gained by one part of the system is exactly equal to the energy lost by another part, but does not indicate probability of the process.
    • The Second Law of Thermodynamics provides the criterion for the probability of various processes.
    • The Second Law can determine whether a process is feasible or not, such as whether a metallic bar of uniform temperature can spontaneously become warmer at one end and cooler at the other.

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    Description

    Understand the limitations of the first law of thermodynamics in predicting energy balance and feasibility of thermodynamic processes. Learn how it applies to changes of state and energy transfer.

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