Unit 11 test review

the difference between the energy of an activated complex and the energy of the reactants of a chemical reaction; the energy with which particles must collide in order to react

• Activation energy

• Activation complex

• entropy

• enthalpy

a collection of intermediate structures in a chemical reaction that persist while bonds break and new bonds form; a range of configurations that atoms pass through in between clearly defined products and reactant

• Activation complex

• activation energy

• catalysis

• enthalpy

the alteration of the rate of a chemical reaction because of the presence of a catalyst

• catalysis

• catalyst

• equilibrium

• potential energy

a substance that increases the rate of a chemical reaction by lowering the activation energy without being chemically changed by the reaction

• catalyst

• catalysis

• endothermic reaction

• le chatelier's principle

a chemical process that absorbs heat

• endothermic reaction

• exothermic reaction

• forward reaction

• equilibrium

the heat content of a system at constant pressure

• enthalpy

• entropy

• reaction rates

• catalyst

a quantitative measure of the disorder or randomness of a system

• entropy

• enthalpy

• potential energy

• spontaneous reaction

the concentrations of the reactants and products are constant and their ratio does not vary; forward and reverse reactions occur at the same rate

• equilibrium

• entropy

• reaction rates

• forward reaction

a chemical process that releases heat

• exothermic reaction

• forward reaction

• potential energy

• catalysis

a chemical reaction that proceeds from left to right

• forward reaction

• reversible reaction

• spontaneous reaction

• activated complex