Evaporation Concepts Quiz
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Questions and Answers

What is the process by which molecules on the surface of a liquid break away and go into the gas phase?

  • Sublimation
  • Vaporization
  • Evaporation (correct)
  • Condensation

    • In a closed container, what is established when molecules return to the liquid at the same rate as they leave it?

  • Equilibrium between liquid and vapor (correct)
  • Formation of a vacuum
  • Complete vaporization of the liquid
  • Increased rate of evaporation

    • What depends on temperature in the same way for molecules in liquids as it does for molecules in gases?

  • Potential energies
  • Electrostatic forces
  • Atomic number
  • Kinetic energies (correct)

    • At a lower temperature, why is evaporation slower and the equilibrium vapor pressure lower?

    <p>A smaller fraction of the molecules have the energy required to escape from the liquid</p> Signup and view all the answers

    What must molecules possess to break away from the liquid during evaporation?

    <p>At least some minimum kinetic energy</p> Signup and view all the answers

    What is evaporation?

    <p>The process by which molecules on the surface of a liquid break away and go into the gas phase</p> Signup and view all the answers

    What happens in a closed container during equilibrium?

    <p>Molecules return to the liquid at the same rate as they leave it</p> Signup and view all the answers

    What affects the kinetic energies of molecules in liquids?

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

    How does temperature affect evaporation?

    <p>At higher temperatures, a greater fraction of molecules have the energy required to escape from the liquid</p> Signup and view all the answers

    What is the relationship between lower temperature and evaporation?

    <p>At lower temperature, a smaller fraction of the molecules have the energy required to escape from the liquid, so evaporation is slower</p> Signup and view all the answers

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