energy and theory

activation energy, particle theory and collision theory

particle theory

states that all matter is made up of very small particles that are in constant motion

collision theory

states the events that need to occur for a successful chemical reaction to occur

collision theory event 1

particles must collide

collision theory event 2

must collide with sufficient force (energy)

collision theory event 3

they must collide with the correct orientation

activation energy

the minimum energy required for a chemical reaction to occur

exothermic reaction

a reaction where the energy of the reactants is higher than the energy of the products

endothermic reaction

a reaction where the energy of the reactants is lower than the energy of the products