CHEM 135 1st Edition Lecture 12 Current Lecture Outline I II III Rate vs reaction concentration Complex rate law and reaction order a Overall reaction order b Examples Integrated Rate Law Rate vs reaction concentration When placed in a graph format Zero order reaction has a straight horizontal line First order reaction has a straight increasing slope Second order reaction has an arched increasing slope Complex rate law and reaction order aA bB cC dD Rate k A m B n k rate constant m n reaction order with respect to A B Overall reaction order m n Ex N2 3H2 2NH3 Reaction order with respect to N2 is first order These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Reaction order with respect to H2 is second order Rate law Rate k N2 1 H2 2 Overall order 3 Ex This reaction was experimentally determined to be first order with respect to O 2 and second order with respect to NO O2 2NO 2NO2 Rate K O2 1 NO 2 Overall order 3 Ex 2NO2 F2 2FNO2 NO2 M F2 M Initial rate of loss of NO2 M s 0 100 0 100 0 026 0 200 0 100 0 051 0 200 0 200 0 103 0 400 0 400 0 411 a What is the order with respect to NO2 With respect to F2 NO2 first order F2 first order b Rate law Rate k N2 1 F2 1 c Overall reaction order 2 d Value of the rate constant K 2 6M 1s 1 e What would the rate be if NO2 05M and F2 075M Rate 2 6 05 075 Rate 9 75 x 10 3 M s Integrated Rate Law ln Shows relationship between time and concentration A kt A0
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