Question | Answer |
activated complex | The arrangement of atoms at the peak of the activation energy barrier. |
activation energy (Ea) | The minimum energy colliding particles must have in order to react. |
transition state | This is what the activated complex is sometimes called. |
Collision theory | says that atoms, ions, and molecules can form a chemical bond when they collide, provided the particles have enough kinetic energy. |
catalyst | A substance that increases the rate of a reaction without being used up itself in the reaction. |
reversible reaction | The reactions in both directions occur simultaneously. |
chemical equilibrium | This is when the forard and the reverse reactions are taking place at the same time. |
Le Chatelier's principle | If a stress is applied to a system in a dynamic equilibrium, the system changes to relieve the stress. |
spontaneous reaction | Naturally favor the formation of products at the specified conditions. |
nonspontaneous reaction | Do not favor the formation of products at the specified conditions. |
equilibrium constant (Keq) | The ratio of product concentrations to reactant concentrations, with each concentration raised to a power given by the number of moles of that substance in the balanced chemical equation. |
entropy | Of a liquid or solid substance at 25 degrees celcius and 101.3 kPa is designated S^o |
Reaction Rate | Speed at which a chemical reaction proceeds, in terms of amount of product formed or amount of reactant consumed per unit of time. |
solubility product constant (Ksp) | Is equal to the product of the concentration terms each raised to the power of the coefficient of the substance in the dissociation equation. |
enthalpy | The amount of heat that a substance has at a given temperature or pressure. |
potential energy diagram | shows how energy changes during the course of a chemical reaction. |