PPT-Exothermic & Endothermic

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. Processes & Reactions. Exothermic. Endothermic. Process. Heat. exiting a substance. Ex: water freezing. Physical change. Heat entering a substance. Ex: water evaporating. Physical. change. Reaction. 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?. Endothermic and Exothermic … 25. Draw 2 vocabulary boxes. EXOTHERMIC. A reaction that releases energy. Gets hotter. Can light up. Reactant energy < Product energy. Ex. Jellyfish, fireflies. Reactants products + energy. Purpose: Observed chemical changes caused by changes in energy.. Background: Define endothermic and exothermic change.. Data:. Temperature. of Water Before. Temperature of Water After. Toasty Marshmallows – p73. Enthalpy Change and Exothermic and Endothermic Reactions. OBJECTIVES. Demonstrate an understanding of the term enthalpy change,. Δ. H. Construct simple enthalpy level diagrams showing the enthalpy change. Ectotherms. Rely mainly on external energy sources.. Endotherms. - Rely heavily on metabolic energy. Homeotherms. . maintain a relatively constant internal environment.. Poikilotherms. (= . heterotherms. By Brittany, . Jaki. , Katie. Starter:. Draw the symbol used in a reversible reaction. 2. What is the difference between a exo and endothermic reaction?. 3. What is respiration an example of, exothermic or endothermic?. 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. . Oxidation Reactions. Exothermic vs Endothermic. Exothermic. Endothermic. A chemical reaction that gives off energy.. The reactants have more energy than is needed to form the products so they release it.. 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 . Agenda. :. Warm up. Intro to the world of chemistry – . Episode 13 – the driving forces of reactions . Notes – Energy changes and Reaction rates . Complete WS: Heat and endothermic / exothermic reactions . 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. Section 20.1. Objectives ~. Compare and contrast exothermic and endothermic chemical reactions. Analyze the energy diagrams for typical chemical reactions. Illustrate the meaning of entropy and trace its role in various processes. 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.