1 / 17

Phase Changes

Phase Changes. Review: 3 Phases of Matter. Solid Liquid Gas. What is a Phase Change ?. Is a change from one state of matter (solid, liquid, gas) to another. Phase changes are physical changes because: - It only affects physical appearance, not chemical make-up.

zihna
Download Presentation

Phase Changes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Phase Changes

  2. Review: 3 Phases of Matter • Solid • Liquid • Gas

  3. What is a Phase Change? • Is a change from one state of matter (solid, liquid, gas) to another. • Phase changes are physical changes because: - It only affects physical appearance, not chemical make-up. - Reversible

  4. What happens during a phase change? • During a phase change, heat energy is either absorbed or released. • Heat energy is released as molecules slow down and move closer together. • Heat energy is absorbed as molecules speed up and expand.

  5. Types of Phase Changes • Types of Phase Changes

  6. Melting • Phase change from a solid to a liquid • Molecules speed up, move farther apart, and absorb heat energy

  7. Freezing • Phase Change from a liquid to a solid • Molecule slow down, move closer together and release heat energy.

  8. Vaporization (Boiling) • Phase change from a liquid to gas. It occurs at the boiling point of matter. • Molecules speed up, move farther apart, and absorb heat energy.

  9. Evaporation • Phase change from a liquid to a gas on the surface of a liquid (occurs at all temperatures). • Molecules speed up, move farther apart, and absorb heat energy.

  10. Condensation • Phase change from a gas to a liquid. • Molecule slow down, move closer together and release heat energy.

  11. Sublimation • Phase change from a solid to a gas. • Molecules speed up, move farther apart, and absorb heat energy.

  12. Deposition • Phase change from a gas to a solid. • Molecules slow down, move closer together and release heat energy.

  13. Graphing a Phase Change

  14. Melting & Boiling Points • Melting Point: The temperature at which a solid changes into a liquid. • Boiling Point: The temperature at which a liquid changes into a gas. • What is a Freezing point? Compare the freezing and melting points of water.

  15. Summary

  16. Why is there no change in temperature during a phase change? Define melting and boiling points. What is the melting point and boiling point of water? At what temperature does water freeze and become a solid? Graphing a Phase Change

More Related