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Changes of State

This lesson explores how adding or removing heat affects the state of substances, focusing on phase changes such as melting and freezing. When heat is added, solids turn into liquids and then gases. Conversely, when heat is removed, gases become liquids and then solids. Thermal energy, the total kinetic and potential energy of particles, plays a crucial role in these transformations. We will also discuss specific properties of water, such as its melting and freezing points, and its unique behavior during phase changes.

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Changes of State

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  1. Changes of State Chapter 7 Lesson 3 Mr. Breeden

  2. What Happens When Heat is Added or Removed From a Substance? • If enough heat is added or taken away, a physical change can occur • A change of state doesn’t change the substance itself, only changes its physical properties. Chemically, it’s still the same

  3. What Happens When Heat is Added or Removed From a Substance? • Add Heat = Solid  Liquid  Gas • Remove Heat = Gas  Liquid  Solid

  4. Thermal Energy • Thermal Energy- is the TOTAL amount of Kinetic & Potential Energy of the particles in an object

  5. Heat • Heat- is the transfer of thermal energy • Heat travels one direction, from warm objects to cooler objects

  6. Changes of State…Melting • Melting is when a Solid changes to a Liquid • The solid absorbs enough energy to make the particles loosen their bonds with each other • The particles are vibrate faster and faster as more energy is absorbed • The melting point of pure H2O is what?

  7. Changes of State Freezing • Freezing is the opposite of melting • Freezing is when a Liquid loses enough energy to become a solid • Energy is removed, the particles vibrate slower until they eventually vibrate in place • What’s the Freezing point of pure H2O? • What unique about H2O when it freezes?

  8. Assignment • Pg. 272 My Planet Diary • Figure 1, 2 • Assess Your Understanding • Figure 3 • Assess Your Understanding

  9. Physical Changes of State Subtitle

  10. Summer Section Header Layout Subtitle

  11. Autumn Section Header Layout Subtitle

  12. Winter Section Header Layout Subtitle

  13. Title and Content Layout with List • Add your first bullet point here • Add your second bullet point here • Add your third bullet point here

  14. Content with Caption Layout Caption

  15. Two Content Layout with Table • First bullet point here • Second bullet point here • Third bullet point here

  16. Content with Caption Layout with SmartArt Caption

  17. Picture with Caption Layout Caption

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