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Course Home Mastering chemistry Course H x Masteringchemistry Assignm x C O Secure https:llsession.masteringchemistry.com/myctitemview?assignmentproblemID 7982 next CHY 122 MWF Kreps Spring 2017 Assignment Problem 14.62 with feedback Problem 14.62 with feedback Part A Understanding the high temperature behavior of nitrogen oxides is essential for controlling pollution generated in automobile Calculate the activation energy for the reaction. engines. The of nitric oxide (NO) to N2 on is second order with a rate constant of o796 s 1 at 737 press the activation energy in kilojoules per mole to three significant digits. Cand 0.0815 M 1. s-1 at 947 C. You may want to reference (ua pages 593 598) Section 14.5 while completing this problem. kJ/mol Submit MAnswerm Incorrect Try Again: 9 attempts remaining The Arrhenius equason can be used to derive a relatonship that relates the rate oonstants (kh and kr) to th as follows: The gas constant, R is equal to 314 J/(mol. K). isolate and solve the term for activation energy, E,

Explanation / Answer

ln (k2/k1) = E/R (1/T1-1/T2)

or, ln (0.0815/0.0796) = E/8.314 J /K/mol [1/737-1/947]

or, E = 651.63 J/K/mol

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