1 / 8

Chapter 6, Section 3 Pages 234-239.

Chapter 6, Section 3 Pages 234-239. Controlling Chemical Reactions. Activation Energy- Draw !. The minimum amount of energy needed to start a chemical reaction. All chemical reactions require a certain amount of activation energy to get started. Figure 12, page 235.

petra-knox
Télécharger la présentation

Chapter 6, Section 3 Pages 234-239.

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. Chapter 6, Section 3Pages 234-239. Controlling Chemical Reactions

  2. Activation Energy-Draw! • The minimum amount of energy needed to start a chemical reaction. • All chemical reactions require a certain amount of activation energy to get started. • Figure 12, page 235.

  3. Rates of Chemical Reactions • Chemical reactions do not occur all at the same rate. Some are very fast, while others are slow. • Factors that affect rates of reaction include surface area, temperature, concentration, and the presence of catalysts or inhibitors. • Figures 13 & 14, pg.’s 236-237.

  4. Concentration • The amount of a substance in a given volume. (Fig. 15, pg. 238) • Adding a spoonful of sugar to lemonade will make it sweet, but adding a larger spoonful of sugar to the lemonade will make it even sweeter. The glass with more sugar has a greater concentration of sugar molecules.

  5. Catalyst • A material that increases the rate of a reaction by lowering the activation energy. • Figure 16, pg. 239.

  6. Enzymes- Draw!!! • Biological catalysts that are very specific. (Fig. 16, pg. 239) • Your body contains thousands of different enzymes, each of which only affect one chemical reaction.

  7. Inhibitor Draw!!! • A material that prevents reactants from coming together. • Preservatives in food are inhibitors used to prevent the food from spoiling.

  8. Questions???

More Related