ch2 science 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 relationship between the reactants and products
reactant
a substance or molecule the participates in a chemical reaction
product
the substance that forms in a chemical reaction
law conservation of mass
the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
synthesis reaction
a reaction in which two or more substances combine to form a new compound
decomposition reaction
a reaction in which a single compound breaks down to form two or more simpler substances
single-replacement reaction
a reaction in which one element or radical take the place of another element or radical in a compound
double-displacement
a reaction in which a gas, a solid precipitate, or a molecular 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 conservation of energy
the law that states that energy cannot 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
