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Category > Chemistry Posted 19 Jun 2017 My Price 5.00

expression for unimolecular rate constants

TH1. Troe (J. Phys. Chem., 83(1), 114, (1979)) proposed a modification of the Lindemann
expression for unimolecular rate constants: km- = kn [M] Flhlhgmll‘DlMl/l‘wllzl—l
1+ kn [Ml/k... where [M] is the concentration of inert background gas which can be obtained knowing the
pressure of the system. Use this expression to do the following: The DH — acetylene reaction is not at the high pressure limit at an ambient pressure of 1 atm.
At 300 K, we have kg = 5.0 x 10'“ cm6 molec‘2 5'1, km = 9.0 x 10'13 cm3 molec’1 5‘1, and PC, a
broadening factor for the fall-off curve, with a value of 0.62. {a} Plot the rate constant, kuni. as a function of pressure between 700 torr and 3000 torr in
100 torr increments. {b} Evaluate km; at 1 atm and 300 K. (c) Compare your answer to {bl with the high pressure limit predicted by the Lindemann
theory of unimolecular reactions.

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SuperTutor
(15)
Status NEW Posted 19 Jun 2017 03:06 AM My Price 5.00

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