The criteria of chemical reaction
There is no denying the fact that kinetics is the study of how fast (the rate) a reaction progresses. The rate of a reaction is a physical property of a reaction and is measured by the change in some reaction quantity ( e.g . volume, mass, concentration) per unit time. The most common method used to calculate the rate of reaction is to measure the change in concentration of the reactant(s) per second. The rate becomes, rate = - ( change in concentration of reactant in mol dm-3 ) / time in seconds {or, rate = change in concentration of product / time}. This gives the unit of mol dm-3 s-1 for the rate of a reaction. The rate of a reaction may be represented by a mathematical equation related to the chemical equation for a reaction, e.g. for the simple hydrolysis reactions of haloalkanes, SN1 : the most important reaction, or the rate determining step, is the breaking of the C-halogen bond. The rate equation for this reaction is written as, where, k = the rate constant for