Question

ause the reaction is first order wiurTo stant, k, by plotting a graph of In Absorbance vs. time. hoose New Calculated Column from the Data menu. nter "In Absorbance" as the Name, and leave the unit blank. nter the correct formula for the column into the Equation edit e Function list, and selecting "Absorbance" from the Variables list c lick on the y-axis label. Choose In Absorbance. A graph of In absorhan ow be displayed. Change the scale of the graph, if necessary. ick the Linear Regression button, write down the slope value in yo box by es list. Cli e rate constant, k lose the Linear Regression box by clicking the X in the corner of the bo re for the next trial, choose Store Latest Run from the Experiment m epa at the necessary steps to complete trials 2-4. The next trials will be at- 25°C. Use small amounts of ice to cool the water bath to the desired ter ABLE Trial Temperature Rate constant, k (s-1) 0-004935 220C 0.00S7 40004029

Answer 1

1) 0.007 0.006 25 0.004935 20 0.005731 150.0046 10 0.004029 0.005 0.004 0.003 0.002 0.001 10 15 20 25 30 Temperature 5.1 5.15 5.2 5.25 5.3 Ink -5.35 Ink 1/T 5.3114 5.16187 0.04 0.05 5.3817 0.066667 y4.6084x - 5.0466 5.51424 slope R 8.314 J/K.mol m-_ 4.6084 5.5 Ea - m x R -4.6084 x 8.314 - 38.3 J/mol 5.55 0.02 0.04 0.1 0.12 0.06 0.08 0.0383 kJ/mol

4) checking 2 and 4

0.005731/0.004029 = 1.42 times

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5)

In-= 1 rl

38.31 In 0.005731 8.314313 293

-38.3 -20 k2 in 0.005731 8.314 91709

766 k2 0.005731 762468 In

62 0.005731 ln 0.001

0.005731

k2 0.005731 = 1.001 一一

K2 = 1.001 x 0.005731= 0.005736