Third Law of Thermodynamics Flashcards
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Questions and Answers

What does the Third Law of Thermodynamics state?

  • All molecular motion stops at absolute zero
  • The entropy of a system approaches a constant value as temperature approaches zero (correct)
  • Entropy increases as temperature decreases
  • Energy cannot be created or destroyed
  • What is absolute zero?

    The coldest temperature, 0 Kelvin, where all molecular motion stops.

    Define entropy in thermodynamics.

    A thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work.

    What is Kelvin?

    <p>A unit of absolute temperature symbolized as K.</p> Signup and view all the answers

    What is a system in thermodynamics?

    <p>A group of interacting, interrelated, or interdependent elements that function together as a whole.</p> Signup and view all the answers

    Define constant value in the context of thermodynamics.

    <p>A numerical entry in a worksheet cell.</p> Signup and view all the answers

    What is specific heat?

    <p>Amount of heat required to raise one gram of a substance by 1 degree Celsius.</p> Signup and view all the answers

    Study Notes

    Third Law of Thermodynamics

    • Entropy approaches a constant value as temperature nears absolute zero.

    Absolute Zero

    • Defined as 0 Kelvin, it represents the theoretical temperature where all molecular motion ceases.

    Entropy

    • A thermodynamic quantity indicating energy within a system that cannot perform mechanical work.

    Kelvin

    • A unit of measurement for absolute temperature, represented by the symbol K; previously referred to as degree Kelvin.

    System

    • Comprises interrelated components that operate collectively to achieve a specific purpose.

    Constant Value

    • Refers to a fixed numerical entry within a cell of a worksheet, maintaining the same value unless altered.

    Specific Heat

    • The quantity of heat needed to increase the temperature of one gram of a substance by 1 degree Celsius, demonstrating heat capacity.

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    Description

    This quiz covers key concepts related to the Third Law of Thermodynamics, including definitions of entropy and absolute zero. Review these essential terms to deepen your understanding of thermodynamic principles. Perfect for students studying physics or material science.

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