unit 2 Flashcards
chemical reaction
the process by which one or more substances change to produce one or more different substances
precipitate
a solid that is produced as a result of a chemical reaction in solution
chemical formula
a combination of chemical symbols and numbers to represent a substance
chemical equation
a representation of a chemical reaction that uses symbols to show the realtionship between the reactants and the products
reactant
a substance or a molecule that participates in a chemical reaction
product
the subtance tha tforms in a chemical reaciton
law of conservation of mass
the law tha tstaes that mass cannot be created or destrowed in ordinary chemical and physical changes
synthesis reaction
a reaction in which two or more substances combine to form a new compound
decomposistion reaction
a reaction in which a single compund breaks down to form two or more simpler substances
single-displacement
a reation in which one element or radical takes the place of another element or radical in a compound
double-displacement
a reaction in which a gas a solid precipitate ior a molecule compound forms from the exchange of ions between two compounds
exothermic reaction
a chemical reaction in which heat is released to the surroundings
endothermic reaction
a chemical reaction that requires heat
law of conservation of energy
the law that says energy can not be created or destroyed but can be changed from one form to another
activation energy
the minimum amount of energy required to start a chemical reaction
