CHEM 1C Lecture Notes - Lecture 3: Half-Life, Rate Equation, Reaction Rate Constant
Example: Determine the rate law and calculate the rate constant for the following reaction from
the following data:
Document Summary
Example: determine the rate law and calculate the rate constant for the following reaction from the following data: Reaction rate is linear in the concentration of one reactant. Example: the reaction a b is first order in a with a rate constant of 2. 8 x 10^-2 1/s at 80 c. The half life, t , is the time required for the concentration of a reactant to decrease to half of its initial concentration. T = t when [a] t = [a] 0 / 2. For first-order reactions: ln 2 / k = 0. 693 / k. Example: what is the half-life of n2o5 if it decomposes via a first-order process with a rate constant of 5. 7 x 10-4 s-1? t = 0. 693/k 0. 693/5. 7 x 10-4 s-1 = 1200 s = 20 minutes. The lifetime, t, is the time required for the concentration of a reactant in a first order reaction to decrease by a factor of e.
