65212 : 65212 - Chemistry 2 Kinetics Notes
Document Summary
Chemical kinetics x x the rates of chemical reactions the sequences of steps (mechanisms) by which reactions occur. Factors determining reaction rates x concentration of reactants (surface area of solids) x temperature (faster at higher t) x catalyst (increases rate without being consumed) x physical state of reactants x molecular structure/size of reactants. The rate of a reaction is the change in concentration of a product or reactant per unit time. Therefore, rate is usually expressed in mol l other time units may be more convenient. The rate of change of product concentration is a positive number (being formed), while the rate for reactants is negative (they are being consumed). Two ways to define the rate of a reaction are illustrated by the decomposition of 2,4,6-trinitrobenzoic acid in water: 3: average rate (not very useful!) average rate = change in conc aof reactant or product change conc. for time interval.
