Heating and Cooling of Substances
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Questions and Answers

What happens to the speed of atoms/molecules when a substance is heated?

  • The speed of atoms/molecules decreases
  • The speed of atoms/molecules increases (correct)
  • The atoms/molecules themselves expand
  • The speed of atoms/molecules remains unchanged

    • What is the effect on the volume of a substance when it is cooled?

  • The volume remains unchanged
  • The volume increases
  • The atoms/molecules themselves shrink
  • The volume decreases (correct)

    • What is the relationship between temperature and the speed of atoms/molecules?

  • Temperature is inversely proportional to the speed of atoms/molecules
  • Temperature is a measure of the average speed of atoms/molecules (correct)
  • Temperature is a measure of the total energy of atoms/molecules
  • Temperature has no relation to the speed of atoms/molecules

    • What happens to the collisions between atoms/molecules when a substance is warmed?

    <p>The collisions become stronger and more frequent</p> Signup and view all the answers

    What is the primary cause of the expansion or compression of a substance when heated or cooled?

    <p>The distance between atoms/molecules increases or decreases</p> Signup and view all the answers

    When a substance is cooled, what happens to the energy of the atoms/molecules?

    <p>The atoms/molecules lose energy</p> Signup and view all the answers

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