Understanding Phase Changes: Liquid to Gas (Evaporation)
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Questions and Answers

What happens during evaporation?

  • Molecules at the surface gain enough energy to enter the gaseous state (correct)
  • Molecules lose energy
  • Molecules at the bottom of the liquid gain energy
  • Liquid turns into a solid

    • Why does evaporation occur at any temperature?

  • Because molecules have to reach a specific temperature to evaporate
  • Because air particles collide with the liquid providing energy for molecules to escape (correct)
  • Because only some molecules can evaporate
  • Because liquids are always at a high temperature

    • What is the relationship between temperature and evaporation?

  • Evaporation occurs faster at higher altitudes
  • Evaporation is not affected by temperature
  • The warmer something is, the faster evaporation occurs (correct)
  • Evaporation occurs faster at lower temperatures

    • What occurs during boiling?

    <p>Molecules throughout the liquid gain enough energy to enter the gaseous state</p> Signup and view all the answers

    What happens to the temperature when a liquid boils?

    <p>It remains constant until all molecules turn into a gas</p> Signup and view all the answers

    What is the average velocity of particles in air at standard conditions?

    <p>480 meters per second</p> Signup and view all the answers

    How do high-speed particles contribute to molecular impacts on any individual particle?

    <p>They account for about 90% of all impacts.</p> Signup and view all the answers

    What is the primary driver of Brownian motion?

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

    What is the main factor that influences the rate of diffusion?

    <p>Concentration gradient</p> Signup and view all the answers

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