Controlling Chemical Reactions Chapter 6 Section 3

Activation Energy A reaction won’t begin until it has enough energy to get it going. . . Activation energy is the minimum amount of energy needed to start a chemical reaction . . . Just enough to get it going!

EXothermic = Heat is EXiting . . .Explodes . . Definition: A reaction in which energy is RELEASED EXothermic = Heat is EXiting . . .Explodes . . Clues: Burning Exploding Freezing Condensing Sound Surrounding Warmer Remember, heat is also called __________________

Endothermic Definition: A reaction in which energy is ABSORBED ENDOthermic = heat flow INTO object Internal temperature of object is warmer! Clues: Growing Melting Boiling Cooking Surrounding Colder

Endothermic

Endo v. Exo Graphs Send a private message with your answers to these questions. Complete sentences!

Let’s test your knowledge! Download and complete the worksheet titled “Chemical Reactions” Be ready to answer these in class through the poll! A. Endothermic B. Exothermic

Rates of Chemical Reactions Surface Area Temperature Concentration Catalysts Inhibitors

Rates of Chemical Reactions Surface Area Temperature Concentration Catalysts Inhibitors Increase in Heat = Faster Reaction

Rates of Chemical Reactions Surface Area Temperature Concentration Catalysts Inhibitors Higher Concentration = Faster Reaction

Rates of Chemical Reactions Surface Area Temperature Concentration Catalysts Inhibitors A material that increases the rate of reaction by lowering the energy needed to get it going.

Rates of Chemical Reactions Surface Area Temperature Concentration Catalysts Inhibitors A material used to decrease the rate of reaction

Flameless Ration Heaters

Flameless Ration Heaters Questions