University College - Chemistry Chem 112A Lecture 3: Reaction Rates
23 Jan 2017
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Rate = k[a][b] k is a proportionality constant of rate of reaction to concentration. Is temperature dependent (at given t, k is constant) Incorporates molecular details, i. e. size, energy of collisions, etc. Time t: [a]t < [a]0, [b]t < [b]0 therefore [c]t > [c]0, [d]t > [d]0 and rate at t < rate at t = 0. Rate of reactions change with time due to concentration. Rate is proportional to the speed of reaction. In a system with competing forward and backward rxns there will be an equilibrium point. A + b -> things are always changing at a molecular scale. Forward and backward processes are ongoing all the time.
