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Types of Chemical Reactions, and Energy

Explore the four types of chemical reactions - synthesis, decomposition, single replacement, and double replacement - and understand the role of energy in these reactions. Learn about exothermic and endothermic reactions and their examples.

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Types of Chemical Reactions, and Energy

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  1. Types of Chemical Reactions, and Energy Essential Question: What happens to chemical bonds during energy exchanges?

  2. Chemical Reaction • There are 4 types of chemical reactions. • Synthesis reactions • Decomposition reactions • Single replacement reactions • Double replacement reactions

  3. What are Synthesis Reactions? • Reaction where two or more substances combine to form another substance. • Synthesis: to combine or compose.

  4. What is a Decomposition Reaction? • Reaction where one substance breaks down, or decomposes, into two or more simpler substances. • Decomposition: Breaking down

  5. What is a Single Replacement Reaction? • Reactions in which one element replaces another in a compound.

  6. What is a Double Replacement Reaction? • Reaction that results in a precipitate, water or gas when a positive ion of one compound swaps with another positive ion of another compound. • Precipitate: is the creation of a solid from a solution. (When the reaction occurs in a liquid solution, precipitates are formed.)

  7. Example of Double Replacement Reactions

  8. How does energy partake in chemical reactions? • Chemical reactions involve energy changes when molecules are moving around. • Exothermic reactions • Endothermic reactions

  9. What is an Exothermic Reaction? • Reactions in which energy is released in forms of heat. • Examples: Burning wood and when fireworks explode.

  10. What is an Endothermic Reaction? • Reactions in which heat energy is absorbed. • Examples: Ice Packs, Photosynthesis

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