R. Atkinson (J. Phys. Chem. Ref. Data 26, 215 (1997)) has reviewed a large set of rate constants relevant to the atmospheric chemistry of volatile organic compounds. The recommended rate constant for the bimolecular reaction of O2 with an alkyl radical R at 298 K is 4.7 × 109 dm3 mol−1 s−1for R = C2H5 and 8.4 × 109 dm3 mol−1 s−1 for R = cyclohexyl. Assuming no energy barrier, compute the steric factor, P, for each reaction
R. Atkinson (J. Phys. Chem. Ref. Data 26, 215 (1997)) has reviewed a large set of rate constants relevant to the atmospheric chemistry of volatile organic compounds. The recommended rate constant for the bimolecular reaction of O2 with an alkyl radical R at 298 K is 4.7 × 109 dm3 mol−1 s−1for R = C2H5 and 8.4 × 109 dm3 mol−1 s−1 for R = cyclohexyl. Assuming no energy barrier, compute the steric factor, P, for each reaction
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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R. Atkinson (J. Phys. Chem. Ref. Data 26, 215 (1997)) has reviewed a large set of rate constants relevant to the atmospheric chemistry of volatile organic compounds. The recommended rate constant for the bimolecular reaction of O2 with an alkyl radical R at 298 K is 4.7 × 109 dm3 mol−1 s−1for R = C2H5 and 8.4 × 109 dm3 mol−1 s−1 for R = cyclohexyl. Assuming no energy barrier, compute the steric factor, P, for each reaction. Hint: Obtain collision diameters from collision cross-sections of similar molecules in the Resource section.
![Table 1B.1 Collision cross-
sections, ơ/nm²
Ar
0.36
C,H,
0.64
4
CH,
0.88
CH,
0.46
Cl,
0.93
CO,
0.52
H,
0.27
Не
0.21
N,
0.43
Ne
0.24
O,
0.40
SO2
0.58](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa4b46faf-5c54-4b19-8b27-ad6ebdd2bfe7%2F0969aa33-6cfc-4922-a0ba-32be92b599d0%2Fmroxodk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Table 1B.1 Collision cross-
sections, ơ/nm²
Ar
0.36
C,H,
0.64
4
CH,
0.88
CH,
0.46
Cl,
0.93
CO,
0.52
H,
0.27
Не
0.21
N,
0.43
Ne
0.24
O,
0.40
SO2
0.58
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