8 th  Grade Chapter 5 Lesson 4 Pgs. 206-218 For Student Use Only
Heat and Phase Change <ul><li>Three States of Matter: </li></ul><ul><ul><li>Solid </li></ul></ul><ul><ul><li>Liquid </li><...
Heat and Phase Change <ul><li>Solids to Liquids= melting </li></ul><ul><ul><li>This point is called the melting point </li...
Heat and Phase Change <ul><li>Latent Heat </li></ul><ul><ul><li>Solid to liquid produces no temperature change </li></ul><...
Heat and Phase Change <ul><li>Evaporation and Condensation </li></ul><ul><ul><li>Evaporation- liquid to a gas </li></ul></...
Heat and Phase Change <ul><li>Evaporation </li></ul><ul><ul><li>Liquids that evaporate quickly are volitile </li></ul></ul...
Heat and Phase Change <ul><li>Internal Evaporation </li></ul><ul><ul><li>Evaporation that takes place in the liquid as opp...
Heat and Phase Change <ul><li>Boiling: </li></ul><ul><ul><li>Evaporation will not occur any quicker above 100 degrees </li...
Heat and Phase Change <ul><li>Pressure Cooker: </li></ul><ul><ul><li>Uses pressure to make food cook faster </li></ul></ul...
Heat and Phase Change <ul><li>Condensation: </li></ul><ul><ul><li>Gas changing into a liquid </li></ul></ul><ul><ul><li>Th...
Heat and Phase Change <ul><li>Evaporation and Condensation </li></ul><ul><ul><li>Heat flows from higher to lower concentra...
Heat and Phase Change <ul><li>Principles of Refrigeration: </li></ul><ul><ul><li>When a gas is compressed its temperature ...
Heat and Phase Change <ul><li>Sublimation: </li></ul><ul><ul><li>A gas changing directly into a solid </li></ul></ul><ul><...
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8th Grade Chapter 5 Lesson 4

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Transcript of "8th Grade Chapter 5 Lesson 4"

  1. 1. 8 th Grade Chapter 5 Lesson 4 Pgs. 206-218 For Student Use Only
  2. 2. Heat and Phase Change <ul><li>Three States of Matter: </li></ul><ul><ul><li>Solid </li></ul></ul><ul><ul><li>Liquid </li></ul></ul><ul><ul><li>Gas </li></ul></ul><ul><li>Changes due to a loss or gain of heat </li></ul>
  3. 3. Heat and Phase Change <ul><li>Solids to Liquids= melting </li></ul><ul><ul><li>This point is called the melting point </li></ul></ul><ul><li>Liquid to Solid= freezing </li></ul><ul><ul><li>This point is called the freezing point </li></ul></ul><ul><ul><li>Freezing point is affected by solutes </li></ul></ul>
  4. 4. Heat and Phase Change <ul><li>Latent Heat </li></ul><ul><ul><li>Solid to liquid produces no temperature change </li></ul></ul><ul><ul><ul><li>This is called latent heat </li></ul></ul></ul><ul><li>Heat of fusion </li></ul><ul><ul><li>Heat required to turn a certain amount of solid into a liquid without changing temperature </li></ul></ul>
  5. 5. Heat and Phase Change <ul><li>Evaporation and Condensation </li></ul><ul><ul><li>Evaporation- liquid to a gas </li></ul></ul><ul><ul><ul><li>Factors that affect evaporation </li></ul></ul></ul><ul><ul><ul><ul><li>Higher temperatures </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Greater surface area </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Air speed over a liquid </li></ul></ul></ul></ul>
  6. 6. Heat and Phase Change <ul><li>Evaporation </li></ul><ul><ul><li>Liquids that evaporate quickly are volitile </li></ul></ul><ul><ul><li>Liquids that evaporate slowly are involitile </li></ul></ul>
  7. 7. Heat and Phase Change <ul><li>Internal Evaporation </li></ul><ul><ul><li>Evaporation that takes place in the liquid as opposed to the usual surface </li></ul></ul><ul><ul><li>Requires high heat </li></ul></ul><ul><ul><li>This is also called boiling </li></ul></ul><ul><ul><ul><li>When evaporation is throughout the liquid </li></ul></ul></ul><ul><ul><ul><li>Boiling Point- when boiling takes place </li></ul></ul></ul>
  8. 8. Heat and Phase Change <ul><li>Boiling: </li></ul><ul><ul><li>Evaporation will not occur any quicker above 100 degrees </li></ul></ul><ul><li>Pressure: </li></ul><ul><ul><li>Affects the boiling point </li></ul></ul><ul><ul><li>Control the pressure and control the boiling point </li></ul></ul>
  9. 9. Heat and Phase Change <ul><li>Pressure Cooker: </li></ul><ul><ul><li>Uses pressure to make food cook faster </li></ul></ul><ul><li>Heat of Vaporization: </li></ul><ul><ul><li>Heat required to change a given amount of liquid into a gas without raising the temperature </li></ul></ul>
  10. 10. Heat and Phase Change <ul><li>Condensation: </li></ul><ul><ul><li>Gas changing into a liquid </li></ul></ul><ul><ul><li>This happens when warm things get cold </li></ul></ul><ul><li>Saturation Point </li></ul><ul><ul><li>When amount of water evaporating equals the amount of condensing </li></ul></ul>
  11. 11. Heat and Phase Change <ul><li>Evaporation and Condensation </li></ul><ul><ul><li>Heat flows from higher to lower concentration </li></ul></ul><ul><ul><li>Refrigeration is using heat and condensation </li></ul></ul>
  12. 12. Heat and Phase Change <ul><li>Principles of Refrigeration: </li></ul><ul><ul><li>When a gas is compressed its temperature rises </li></ul></ul><ul><ul><li>When a gas is allowed to expand its temperature falls </li></ul></ul><ul><ul><li>When a liquid evaporates it absorbs heat from the surroundings </li></ul></ul><ul><ul><li>When a gas condenses is releases heat into its surroundings </li></ul></ul>
  13. 13. Heat and Phase Change <ul><li>Sublimation: </li></ul><ul><ul><li>A gas changing directly into a solid </li></ul></ul><ul><li>4 th State of Matter: </li></ul><ul><ul><li>Plasma- super heated gas </li></ul></ul>

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