Use this format to put them in your notes! Types of Reactions Use this format to put them in your notes! These notes are arranged in a specific fashion to help you understand… Definition In easy words Chemical Example Analogy/Real world example

Synthesis: 2 or more simple substances combine to form a more complex substance 2 small things form one big thing 2H2 + O2 2H2O Quarterback + Wide Receiver Complete Pass Good Food + Me A Happy Person

Decomposition: A more complex substance breaks down into its more simple parts Something big breaks down into 2 small things 2H2O 2H2 + O2 GloveBall Glove + Ball Completed Puzzle Puzzle Piece + Puzzle Piece

Single Displacement: A single uncombined element replaces another in a compound A single & a pair on one side switch places to a new single & a new pair Zn + 2HCl ZnCl2 + H2 DogBone + Steak DogSteak + Bone CatMouse + Catnip CatCatnip + Mouse

Double Displacement Reaction: Reaction parts of 2 compounds switch places to form 2 new compounds 2 more complex substances break apart and combine in a different way to form 2 new substances Ag(NO3) + NaCl AgCl + Na(NO3) Boy1Girl1 +Boy2Girl2 Boy1Girl2 + Boy2Girl1 QBackFootbal +PitcherBaseball QbackBaseball+PitcherFootball

Exothermic: A chemical reaction in which energy is released from the reactants; Temperature warms; Energy is on the product side of the reaction A reaction where heat is released into the environment Mg + 2H2O Mg(OH)2 + H2 + Heat Hand Warmers Thermal Back Stickers + =

A reaction where heat is sucked into the objects Endothermic: a chemical reaction in which energy is absorbed by the reactants; temperature of the surroundings decreases; Energy will be on the reactant side A reaction where heat is sucked into the objects (NH4)(NO3) + H2O+Heat NH4 + NO3 Ice Pack + =

Combustion: All substances in a compound are combined with oxygen, which then produces carbon dioxide and water; heat is produced A reaction where burning is produced CH4 + 2O2 CO2 + 2H2O + Heat Gas burned in cars Gas burned in heating units + = O2