PPT-UNIT 9 Energy and Reactions

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 . DEFINITIONS AND TYPES. Revision:. DO NOT WRITE- FOR YOUR INFO ONLY. We have looked at the period table, what atoms are, elements and compounds. You have learnt that atoms can join to make compounds or molecules and that we can mix compounds to make new compounds…..these are chemical reactions. In general, we look at what occurs and try to learn how it happens. Common patterns describe the changes. Addition reactions – two molecules . combine. Elimination reactions – one molecule splits into two. Nunc Agenda: Write the formula for photosynthesis. Quaestio: How do plants capture the sun’s energy?. Nunc Agenda: What do you think photolysis means?. The Plant Cell. Chloroplast Structure. Chloro. Thermodynamic Control of Reactions. Enthalpy. Bond Energies. Forming stronger. bonds favors. reactions.. Molecules with. strong bonds are. more stable.. Entropy. Randomness. Reactions that. Synthesis reactions. Decomposition reactions. Single replacement reactions. Double replacement reactions. (Precipitate reaction). Chemical Reactions can be written as:. Word equation. Chemical equation. Add the new notes to your . table of contents. , and then turn to the next clean page and set up your title and date. Tape the two slides into your INB flat down, directly under your title - they do not need to flip up. Chemical Reactions. :. A . chemical reaction . is a process that changes one set of chemicals into another by rearranging chemical bonds. The elements you start with are . reactants. The elements you end with are . Grade Science. Bowling Green Junior High. What are chemical reactions?. Chemical Reaction. . – . a change that takes place when two or more substances (reactants) interact to form new substances (products) with new properties.. Calculating . D. G. o. as a State . Function.. Solving . D. G. o. Using Hess’s . Law.. Using . the following data (at . 25. o . C). C. diamond. (s. ) + O. 2. (g) . . CO. 2. (g) . D. G. Metabolism: chemical reactions in cells Countless chemical reactions take place in cells and are responsible for all the actions of organisms. Together, these reactions make up an organism'smetabolis Our estimates of pressures and temperatures experienced by rocks during metamorphism are based on metamorphic reactions.. Mineral Reactions. There are two basic types of mineral reactions:. Continuous. b. . . The . synthesis of large molecules involves anabolic reactions.. c. . . The . breakdown of sucrose to smaller molecules is a catabolic reaction.. d. . . The . combination of small molecules to give a large molecule is an anabolic reaction. What is a Chemical Reaction?. A Chemical reaction occurs when ever a chemical bond is formed, broken or rearranged.. A chemical reaction will always create a new substance.. Energy and Chemical Reactions. All. chemical reactions either release or absorb energy. . The energy can take many forms: . HEAT. , . LIGHT. , . SOUND. , and . ELECTRICITY. . Chemical . bonds. are the source of this energy. .