click below
click below
Normal Size Small Size show me how
ch 21
Question | Answer |
---|---|
Chemical reaction | changed into new substances |
Reactant | substance that reacts |
Product | new substance that is formed |
Chemical equation | shorthand method |
Coefficient | represents the number of units of substance |
Balanced chemical equation | the same number of atoms of each element on both sides of the equation |
Combustion reaction | chemical reaction when a substance reacts with oxygen |
Synthesis reaction | two or more substances combine to form a different substance |
Decomposition reaction | chemical reaction which one substance breaks down into ( two or more substances) |
Single-displacement reaction | one element replaces another element in a compound |
Double-displacement reaction | when two ionic compounds in solution are combined |
Precipitate | double-displacement reaction |
Oxidation | loss of electrons |
Reduction | gain of electrons |
Exergonic reaction | chemical reaction that (releases) some form of energy such as light or heat |
Exothermic reaction | chemical reaction in which energy is (given off) in the form of heat |
Endergonic reaction | chemical reaction that requires energy (input) (heat, light, or electricity) in order to proceed |
Endothermic reaction | chemical reaction that requires heat energy in order to proceed |
Catalyst | speeds up a chemical reaction |
Inhibitor | slows down a chemical reaction |