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Chem Reactions

Chemical Reactions

QuestionAnswer
chemical reaction produces new substances by changing how atoms are arranged
reactants substances present when a chemical reaction starts
products substances formed (produced) by a chemical reaction
catalyst substance that speeds up a chemical reaction but is not consumed in the reaction
coefficient the number of molecules of a substance in a chemical reaction
law of conservation of mass atoms are not created or destroyed by chemical reactions
The CPGT Indications of a Chemical Reaction *Color change *formation of a Precipitate (solid product) *formation of a Gas *Temperature change
synthesis reaction new compound is formed from the combination of simpler reactants: A + B ---> AB
decomposition reaction reactant breaks down into simpler products: AB ---> A + B
combustion chemical reaction in which a substance reacts with oxygen, usually with the rapid release of heat and the production of a flame, such as the burning of methane gas
single replacement reaction during a chemical reaction, one element replaces another in a compound: A + BC ---> AC + B
double replacement reaction during a chemical reaction, two elements replace each other in different compounds: AB + CD ---> AD + CB
endothermic reaction (Endo's AEDT!) chemical reaction that Absorbs surrounding Energy producing a Decrease in Temperature of the reaction mixture: REACTANTS + ENERGY ---> PRODUCTS
exothermic reaction (Exo's REIT!) chemical reaction that Releases Energy producing an Increase in Temperature of the reaction mixture: REACTANTS ---> PRODUCTS + ENERGY
The CSTC Factors that Affect the Rate of Chemical Reactions *Concentration *Surface size *Temperature *Catalyst
brilliant what you are :)
activation energy the minimum amount of energy needed to start a chemical reaction
Created by: shirleybeth