Question

L o Lim-e ^nin- 26.5 lo 2 34.5 properly place the AIBN in the flask. 8. Wait two (2) minutes and make the first reading of volume in the buret and time. This time is important since all other measures will be made relative to this one. 9. Record the volume and time every two (2) minutes, approximately. 10. Determine the atmospheric pressure and the ambient temperature in the laboratory. 11. Once the volume has reached its maximum value, stop recoding data. Results 1. Use a first order kinetics for all calculations 2. Calculate the rate constant for the reaction decomposition of AIBN.

Answer 1

First ordeY kinetics , X-Y γ = k [X] Exl, initai concenbation or moles -...(1) Pam = 1.019 tar 1.005 bar atm 19.5 - 242.5 K R 0.0821 atn L Now , at 22.5 K Fy I mm H 0-0224 ahm K mo ) tme (min) PV Volume (mL) moles (n) = 10 404x 0 26.5 10.84 XID 32 13.09 X tD 13-50 x10 13.i x10 14.11 ΧΙΟ. 34 I D 84.5 12

From equaton (1) -kt -3 Xo1 150X10 164.21 /mol fkt 0 Cyl, -kt For t 0 to t 2 K0.672 min-1 for t 2 to t4 min OY Kニ0-1414 min-i for t 4 to t:8min K 0 01148 min rt 8 to tID min k 0.02277 min-1 t:10 tot:12min K0. 01104 min for Rate censtant K 0.011 min-1