click below
click below
Normal Size Small Size show me how
IGHS Winkels
Physical Science Chapter 7
Term | Definition |
---|---|
Reactants | the substances that undergo change in a chemical reaction |
Products | the new substances formed as a result of a reactant change |
Chemical equation | a representation of a chemical reaction in which the reactants and products are expressed as formulas |
Coefficients | numbers that appear before the formulas in a chemical equation |
Mole | an amount of a substance that contains appproximately 6.02 x 10 to the 23rd power particles of that substance |
Molar mass | the mass of one mole of a substance |
Synthesis reaction | a reaction in which two or more substances react to form a single substance |
Decomposition reaction | a reaction in which a compound breaks down into two or more simpler substances |
Synthesis reaction | a reaction in which two or more substances react to form a single substance |
Decomposition reaction | a reaction in which a compound breaks down into two or more simpler substances |
Single-replacement reaction | a reaction in which one element takes the place of another element in a compound |
Double-replacement reaction | one in which two different compounds exchange positive ions and form two new compounds |
Combustion reaction | one in which a substance reacts rapidly with oxygen often producing heat and light |
Chemical energy | the energy stored in the chemical bonds of a substance |
Exothermic reaction | a chemical reaction that releases energy to its surroundings |
Endothermic reaction | a chemical reaction that absorbs energy from its surroundings |
Reaction rate | the rate at which reactants change into products over time |
Catalyst | a substance that affects the reaction rate without being used up in the reaction |
Equilibrum | a state in which the forward and reverse paths of a change take place at the same rate |
Reversible reaction | a reaction in which the conversion of reactants into products and the conversion of products into reactants can happen simultaneously |