Question

The following data show the rate constant of a reaction measured at several different temperatures.

Temperature (K)	Rate Constant (1/s)
310	4.54×10−2
320	0.136
330	0.381
340	1.01
350	2.51

Part A

Use an Arrhenius plot to determine the activation barrier for the reaction.

Express your answer using three significant figures.

Part B

Use an Arrhenius plot to determine the frequency factor for the reaction.

Express your answer using two significant figures.

Answer 1

1/T	ln K
0.003226	-3.09224
0.003125	-1.9951
0.00303	-0.96496
0.002941	0.00995
0.002857	0.920283

from the plot - slope = Ea / R

so activation energy Ea = 8.314 * .10889 = 90531.15 J / mol

= 90.53 kJ / mol

now for frequency factor

lnA= intercept = 32.033

so frequency factor A = 8.2 * 10¹³