1 / 17

Freezing/Melting and Boiling Points

Freezing/Melting and Boiling Points. Spacing of Molecules in a Solid, Liquid, & Gas. Use this link http://www.chem.purdue.edu/gchelp/liquids/character.html. cools. rain. snow. Freezing/Melting Point. What is freezing point? It is the temperature at which a liquid becomes a solid. warms.

haley
Download Presentation

Freezing/Melting and Boiling Points

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. Freezing/Melting and Boiling Points

  2. Spacing of Molecules in a Solid, Liquid, & Gas • Use this link http://www.chem.purdue.edu/gchelp/liquids/character.html

  3. cools rain snow Freezing/Melting Point • What is freezing point? • It is the temperature at which a liquid becomes a solid

  4. warms rain snow Freezing/Melting Point • What is melting point? • It is the temperature at which a solid becomes a liquid

  5. Freezing/Melting Point • What is the unit of measurement that scientists use for temperature? • Celsius • What is the temperature at which a WATER (liquid) becomes a solid (ice or snow)?

  6. Freezing/Melting Point • What is the temperature at which a WATER (liquid) becomes a solid (ice or snow)? • 0o degrees Celsius

  7. Freezing/Melting Point • If the temperature warms up 1 degree above 0o Celsius – what happens? • The ice or snow will melt • Or change from a solid to a liquid

  8. Freezing Point 0 Water freezes at ____ degrees Celsius • On your handout, use a marker to color in the temperature at which water freezes or becomes a solid (ice or snow) on the “Freezing Point” thermometer Water is a liquid that changes to a solid when it freezes.

  9. Gas Boiling Point • What is a boiling point? • It is the temperature at which a liquid becomes a gas.

  10. Boiling Point • What is the boiling point of water? • Does water continue to get hotter the longer you let it boil? • Let’s try it & see • http://www.youtube.com/watch?v=RN0XF9qQB6M

  11. Boiling Point • At what temperature did the water boil? • 100o Celsius • Did the water continue to get hotter the longer you let it boil? • No • Once the water boils, it will not get any hotter – it will continue to boil until it all the liquid changes into a gas

  12. 100 Boiling Point Water boils at ____ degrees Celsius • On your handout, use a marker to color in the temperature at which water (a liquid) boils or becomes a gas on the “Boiling Point” thermometer Water is a liquid that changes to a gas when it boils.

  13. Heating Chocolate • What happens to chocolate when we heat it? • Is the chocolate chip a solid or liquid? • It’s a solid • Place one chip on your spoon and hold it over the candle for about 45 seconds • Use your tooth pick to poke it

  14. Heating Chocolate • What happens to chocolate when we heat it? • Is the chocolate chip a solid or liquid AFTER heating? • It’s turning into a liquid • Did it boil or change into a gas? • NO

  15. Water boils at 100o C

  16. Does it change into a gas? Yep! Yep! Yep!

More Related