PPT-Exothermic and Endothermic

Endothermic and Exothermic 25 Draw 2 vocabulary boxes EXOTHERMIC A reaction that releases energy Gets hotter Can light up Reactant energy lt Product energy Ex Jellyfish fireflies Reactants products energy. Heat/Energy needs to be…... . added or removed. Heat that is removed is….. Exothermic. system. heat. surroundings. Heat that is added is….. Endothermic. system. heat. surroundings. Endothermic versus Exothermic Example WS. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture. 19. Today’s. . lecture. Gas Phase Reactions. Trends and Optimums. . vs. . Exothermic Reactions:. By: Crystal & Caitlin! :D . Endothermic:. Exothermic:. An Exothermic . reaction is the . combustion of Acetone peroxide. . . The Definitions. . Exothermic- . Thermochemistry. Part 1. Chapter 17. Thermochemistry. The study of . energy. changes that occur during chemical reactions (chemical change) AND changes in state (physical change).. . Did you know?. Which one is easier to make happen?. Building a sand castle?. Destroying a sand castle?. How about these?. Wrecking your snowman?. Building as snowman?. And these?. Making a cake?. Making a mess?. What does Baking a cake, building a snow man, or making a sand castle have in common?.  . 60 grams . 75 grams . 135 grams . 270 grams . Exothermic . vs. Endothermic . Exothermic. Reaction that . transfers energy to the surroundings. More energy . is . released. when a bond . forms than is used to break bonds. REACTIONS. Energy in Reactions. Some chemical reactions . release. heat to the surroundings. These are called . EXO. THERMIC. reactions. Heat . EXITS. the reaction. Some chemical reactions . absorb. First Law of Thermodynamics . Energy. Many types of energy .  must obey . law of conservation of energy. Energy cannot be created or destroyed, it can only change forms. energy . – capacity to do work . Ectotherms. Rely mainly on external energy sources.. Endotherms. - Rely heavily on metabolic energy. Homeotherms. . maintain a relatively constant internal environment.. Poikilotherms. (= . heterotherms. INTRODUCTION. All reactions require energy to break bonds in the reactants, and all reactions give off energy when new bonds form to make products. The difference in energy required to break the bonds and to make the new bonds can tell you whether the reaction is endothermic or exothermic. . able to. ……. .:. Must (Grade F): State a definition for. exothermic and endothermic.. Should (Grade C/D): Recognize an exothermic . and endothermic reaction in a graph. Could (Grade B/A): Explain the difference . Success is the result of preparation, hard work and learning from failure. Describe the difference between an exothermic & . an endothermic . reaction. State the different methods of heat transfer & an example of each. A form of energy. Flows from warmer objects to cooler objects. Represented by the variable “q”. Measured by units: calorie or joule. 1 J = 0.2390 . cal. 4.184 J = 1 . cal. 1000 . cal. = 1 . kilocalorie . By majd Khalid and Mohammed. The difference. exothermic. Exothermic substances are substances that release energy in the form of heat causing the temperature of the surroundings to increase thus generating a positive change in temperature.