Latent Heat of Vaporisation in Water
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Questions and Answers

What is the main factor that affects the rate of evaporation?

  • Surface area exposed to the atmosphere (correct)
  • Color of the liquid
  • Density of the liquid
  • Wind direction
  • Which of the following is a surface phenomenon?

  • Evaporation (correct)
  • Sublimation
  • Solidification
  • Condensation
  • What is the latent heat of fusion?

  • Heat energy to change gas to liquid
  • Heat energy to change liquid to gas
  • Heat energy to change gas to solid
  • Heat energy to change solid to liquid (correct)
  • What is the physical state of solid carbon dioxide at room temperature?

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

    At what temperature does water boil on the Kelvin scale?

    <p>$273$ K</p> Signup and view all the answers

    What temperature is required for water to change into the vapour state?

    <p>373 K</p> Signup and view all the answers

    What is the reason particles in steam have more energy than water at the same temperature?

    <p>They have absorbed extra energy from the surroundings</p> Signup and view all the answers

    What does the Kelvin scale help us understand about the state of matter temperature?

    <p>How close a substance is to absolute zero temperature</p> Signup and view all the answers

    Which substance changes directly from solid to gaseous state without becoming a liquid?

    <p>Solid carbon dioxide</p> Signup and view all the answers

    What physical process allows solid carbon dioxide to change directly into a gas?

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

    How do we convert a temperature from the Celsius scale to the Kelvin scale?

    <p>Add 273 to the given temperature</p> Signup and view all the answers

    What is the significance of a decrease in humidity on the rate of evaporation?

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

    What causes the temperature to remain constant during the change of state for any substance?

    <p>A decrease in energy</p> Signup and view all the answers

    How does an increase in surface area affect the rate of evaporation?

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

    What is the physical state of solid carbon dioxide at room temperature?

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

    How does an increase in temperature affect the rate of evaporation?

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

    What is the effect of wind velocity on evaporation?

    <p>Increases evaporation</p> Signup and view all the answers

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