CHEM102 Lecture Notes - Lecture 6: Rate-Determining Step, Dan Piraro, Elementary Reaction

• School: University of Alberta
• Department: Chemistry
• Course: CHEM102
• Professor: Yoram Apelblat

Document Summary

Rxn mechanism = sequence of steps by which a rxn occurs. It must reproduce the observed overall stoichiometry and reproduce the observed rate law. At 550 c the rate constant is 1. 1 m/s and at 625 c it is 6. 4 m/s. Calculate ea. and a k1 = 1. 1 m/s t1 = 550 c k2 = 6. 4 m/s t1 = 625 c ln. To find a plug into ln a = ln k + A = e21. 139 = 1. 5 x 109 m/s. Elementary rxn = rxn that occurs in a single step. It has special properties: aa + bb cc + dd. Rate = k [reactants]stoich coefficients = k [a]a [b]b. For example, if the following is an elementary rxn. Then rate = k [no3][co: the molecularity for an elementary rxn is. No 4 or higher ! no fractions ! no zeros, no ve values!