Page 160 - [B._MURPHY,_C._MURPHY,_B._HATHAWAY]_A_working_meth

144 Chapter 9
"/M PI/M Initial rate/M s- '
Rate 1 3.5 2.33 8.6 x
Rate 2 1.05 7 2.87 x 10-~
Rate 3 1.05 21 2.58 x 10-~
Determine the approximate overall order of the reaction.
2. Evaluate the activation energy of the reaction, Eact, for A + 2B --+
C, using a graphical procedure, given the following relative rate
constants at various temperatures (R = 8.314 J K-' mol-').
T/"C 77 102 127 154 178 204
k 2 6 18 54 162 486
3. In a given reaction, k = 2.6 x lo-'' s-' at 32 "C and 8.7 x
10- '' s- at 43 "C. Determine Eact, the activation energy of the
reaction, the pre-exponential factor, A, and the value of k at
55 "C, given that R = 8.314 J K-' mol-'.