CHM 1046 Lecture Notes - Lecture 29: Reaction Mechanism, Rate Equation, Reaction Rate Constant
Document Summary
Kinetics the study of how fast chemical reactions occur. 4 important factors that affect rates of reaction: catalyst. Speeds up a reaction without being consumed. It could lower or stabilize the energy at the transition state. By the change in concentratio(cid:374) with ti(cid:373)e (cid:894)reactio(cid:374) rates; [a]/ t(cid:895) What is the speed of a reaction measured in? rate of disappearance: -(cid:894) [a]/ t(cid:895) T=time the speed at which reactants disappear (and the equation) rate of appeara(cid:374)ce: +(cid:894) [a]/ [t](cid:895) T=time the speed at which products appear (and the equation) R=k[a]^m[b]^n k the rate constant in the rate law equation. Rate = [concentration]^m how to find the order of a reaction. The reaction is zeroth order if the concentration changes, but the rate doesn"t change at all e. g. : [a]^m=1 m=0 (zeroth order), rate stayed constant. The reaction is first order if the concentration changes and the rate changes by the same multiple of that concentration change e. g. : [a]^m=2; [a]=2.
