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Exploring Phase Changes: Boiling, Melting, Freezing, Evaporation, and Condensation

This educational video delves into the fascinating world of phase changes in matter, discussing how substances switch between solid, liquid, and gas states. Learn about the importance of heat energy in inducing phase changes and discover key concepts such as boiling points, melting points, and freezing points. The video highlights the differences between boiling and evaporation and emphasizes that each substance has unique phase change temperatures. Perfect for students seeking to understand the fundamental principles of physical science.

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Exploring Phase Changes: Boiling, Melting, Freezing, Evaporation, and Condensation

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Presentation Transcript

  1. Phase Changes Looking at Boiling, Melting, and Freezing points, Evaporation and Condensation

  2. Physical science series: phases of matter 18 min video • http://player.discoveryeducation.com/index.cfm?guidAssetId=CCAD037E-5E2D-4AC3-9929-090E6277C929&blnFromSearch=1&productcode=US

  3. Phase Change • Matter can change from one phase to another. • This is called a Phase Change

  4. Phase Changes • The amount of heat energy in any particular piece of matter can change. • A big enough change in heat energy causes a phase change. • Solids Liquids Gas • There are different names for each of the phase changes. Add Heat Energy Add Energy

  5. Melting- change from a solid to a liquid Vaporization – change from liquid to gas. Boiling Evaporation Condensation- change from a gas to a liquid. Freezing – change from a liquid to a solid. Sublimation – change from a solid to a gas Different names for each Phase Changevocabulary

  6. Vaporization • Difference between boiling and evaporation • Evaporation – happens at the surface – usually due to sun’s energy. • Boiling happens within the liquid. Inside of liquid changes to a gas, this is why there are bubbles.

  7. Decrease temp- Condensation Freezing Increase temp- Melting Sublimation Evaporation Boiling Phase Changes Phase Changes are Caused by either an increase or decrease in heat energy (temperature).

  8. Phase Change Points • Each substance has a temperature that it changes phase at. • Different for all substances! • For example, freezing point for water is 0ºC. The freezing point for gold is approximately 1064ºC. • boiling point, freezing point, melting point, condensation point alldo not change if you have more or less of the substance.

  9. Temperatures at which one state turns to another……  • BOILING POINT- liquid turns to gas • MELTING POINT – solid turns to liquid • FREEZING POINT – liquid turns to solid • BOILING POINT of water- 100 ˚ C (or above) • MELTING POINT of water - 0˚ C (or above) • FREEZING POINT of water- 0˚C  (or below

  10. Water

  11. Interactive matter phase change • http://www.miamisci.org/af/sln/phases/watersolid.html

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