Reaction Rates Factors, Activation Energy, Le Chatelier’s Principle, Kinetic-Molecular Theory, Collisions Theory of Gases

Factors Affecting Reaction Rates Temperature - hotter temps react faster Surface area – smaller pieces react faster Catalysts – speeds up reaction Inhibitors – slows down reaction Concentration – higher conc speeds up reaction Nature of reactants – more reactive elements speed up reaction

Activation Energy Definition: the minimum amount of energy required to start a chemical reaction Energy of activation

LeChatelier’s Principle Deifinition: when a system at equilibrium is subjected to a stress, the system will shift its equilibrium point in order to relieve the stress Stresses include a change in: Pressure Concentration Temperature

Kinetic-Molecular Theory Definition: explains that the behavior of physical systems depends on the combined actions of the molecules constituting the system Expansion, Fluidity, Low Density, Compressibility, Diffusion and Effusion

Collisions Theory of Gases Definiton: the number of new compounds formed in a chemical reaction is equal to the number of molecules that collide, multiplied by a constant that corrects for low-energy collisions Must be the right speed (activation energy requirement), and right orientation (direction)