Thermodynamics Basics: Understanding Work and Heat
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Questions and Answers

What is the formula for pressure-volume work?

  • w = p / ΔV
  • w = -p * ΔV (correct)
  • w = ΔV / p
  • w = p * ΔV

    • What happens to the internal energy of a system when it gives off heat or does work?

  • It increases
  • It remains constant
  • It decreases (correct)
  • It becomes zero

    • What is the relationship between the change in internal energy of a system and its surroundings?

  • ΔU_system = ΔU_surroundings / 2
  • ΔU_system = ΔU_surroundings
  • ΔU_system = 2 * ΔU_surroundings
  • ΔU_system = -ΔU_surroundings (correct)

    • What is the consequence of the first law of thermodynamics?

    <p>Energy is always conserved</p> Signup and view all the answers

    What happens to the internal energy of a system when work is done on it?

    <p>It increases</p> Signup and view all the answers

    What is the role of the surroundings in the context of the first law of thermodynamics?

    <p>The surroundings absorb energy from the system</p> Signup and view all the answers

    What is the primary focus of the scientific study of thermodynamics?

    <p>The interaction of heat and other types of energy</p> Signup and view all the answers

    What is internal energy in the context of thermodynamics?

    <p>The energy stored in chemical bonds and kinetic energy of molecules</p> Signup and view all the answers

    What is the primary difference between work and heat in thermodynamics?

    <p>Work is the force used to transfer energy, while heat is the transfer of thermal energy</p> Signup and view all the answers

    What is the fundamental principle underlying the laws of thermodynamics?

    <p>Energy cannot be created nor destroyed, but it can be converted or transferred</p> Signup and view all the answers

    What is the result of the interactions between heat, work, and internal energy in a system?

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

    What is the role of work in the context of thermodynamics?

    <p>Work is necessary to transfer thermal energy between systems</p> Signup and view all the answers

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