1 / 22

Chemical Reactions

Chemical Reactions. The story. Meet 2H 2 O. Hi there. So is this. This is H 2 O. They weren’t always so happy. Hmph. You’re out of control. Bbbllgghh!!. Meet O 2. You need me. I’m important. Meet H 2. He’s light. He’s fast. He’s crazy!. B-b-b-b-b. One day…. Hey! Quit it!.

samuel-buck
Download Presentation

Chemical Reactions

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. Chemical Reactions The story

  2. Meet 2H2O Hi there. So is this. This is H2O.

  3. They weren’t always so happy.

  4. Hmph. You’re out of control Bbbllgghh!!

  5. Meet O2 You need me. I’m important.

  6. Meet H2 He’s light. He’s fast. He’s crazy! B-b-b-b-b

  7. One day… Hey! Quit it!

  8. One day…

  9. Chemical Reactions Bonds are broken and new bonds are formed. Bonds in H2 & O2 break.

  10. Chemical Reactions Bonds are broken and new bonds are formed. WHAM! WHAM! WHAM! WHAM! New bonds form.

  11. Chemical Reactions New substances are formed. Water is formed 2 gases react

  12. Parts of a Reaction Reactants: The chemicals you have before the reaction That’d be us. Tbtbbhth! Tbtbbhth! H2 H2 O2

  13. Parts of a Reaction Products: The substances created in the reaction H2O H2O

  14. Parts of a Reaction Chemical Equation Reactants Products 2H2 + O2 2H2O

  15. Chemical Reactions During chemical reactions atoms are not created or destroyed. They’re just rearranged. 2 oxygen atoms 4 hydrogen atoms 2 oxygen atoms 4 hydrogen atoms

  16. How can you tell if a chemical reaction has happened? Let me give you some hints.

  17. Is it a chemical reaction? If a gas is produced it might be a chemical reaction. Look for the bubbles!

  18. Is it a chemical reaction? If it changes color it might be a chemical reaction. Like iron rusting!

  19. Is it a chemical reaction? If it gets hotter it might be a chemical reaction.

  20. Is it a chemical reaction? Or…if it gets colder it might be a chemical reaction.

  21. Exothermic Reactions Exothermic reactions release energy. These reactions feel hot.

  22. Endothermic Reactions Endothermic reactions absorb energy. These reactions feel cold.

More Related