CHEM 411 Study Guide - Quiz Guide: Rate-Determining Step, Exothermic Welding, Reaction Step
Document Summary
An effective collision must have the proper orientation and proper energy/ strength to break the bonds. effective collisions are those that result in a chemical reaction. In order to produce an effective collision, reactant particles must possess some minimum amount of energy. This energy, used to initiate the reaction, is called the activation energy. 1: the molecules must have sufficient energy to initiate the reaction (called activation energy). Temp: increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction. Surface area: the rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. This is done by cutting the substance into small pieces, or by grinding it into a powder. If the surface area of a reactant is increased: more particles are exposed to the other reactant.
