CHEM 123 Lecture Notes - Lecture 9: Rate Equation, Molecularity

• School: UBC
• Department: Chemistry
• Course: CHEM 123
• Professor: Hongbin Li

Document Summary

Rxn order is not related to stoichiometric coefficients, order cannot be determined unless it is an elementary rxn. Integrated rate law: gives the conc"n of reactants or products at any time after the start of the rxn. Linearization: slope=-l, to verify that a rxn is first order, plot the natural logarithm of its conc"n as a fxn of time. In first order rxns, the conc"n of the reactant decays exponentially with time and expect a straight line with a slope of -k. Half-life of first order rxns: constant and independent of initial conc"n. Inversely proportional to the conc"n of the reactant: to verify that a rxn is a second order, plot 1/[a] as a fxn of t and expect a straight line w a slope of k.