19 terms

Chapter 7

the substances that undergo change
new substances formed as a result
single replacement reaction
a reaction when one element takes tha place for another element
double replacement reaction
one in which two different compounds exchange positive ions and form two new compounds
combustion reaction
is one in which a substance reacts rapidly with oxygen, usually makes hea and light
oxidation-reduction reaction
a reaction in which electrons are transferred from one reactant to another
Chemical energy
the energy stored in chemical bonds of a substance
exothermic reaction
a chemical reaction that releases energy to its surroundings
endothermic reation
a chemical reaction that absorbs energy from its surroundings
reaction rate
the rate at which reactants change into products over time
substance that effects the reaction rate without being used up in the reaction
is a state in which the forward and reversepaths of a change take place at the same time
reversible reaction
is a reaction in which the conversion of reactants into products and the conversion of products into reactions can happen simultaneously
synthesis reaction
is a reaction in which two or more substances react to form a single substance
decompositon reaction
is a reaction when a compound breaks down into two or more simpler substances
molar mass
the mass of one mole
an amount of a substance that contains approximatley 6.02X10 to the 23rd power
chemical equation
is a representation of a chemical reaction where the reactants and products are expressed as formulas
the numbers that appear before a formula