Question

1. In a study of the decomposition of nitrosyl bromide at 10 °C NOBr ---> NO...

1. In a study of the decomposition of nitrosyl bromide at 10 °C

NOBr ---> NO + ½ Br2

the following data were obtained:

[NOBr], M 6.71×10-2 3.36×10-2 1.68×10-2 8.40×10-3
seconds 0 20.9 62.8 147


Hint: It is not necessary to graph these data.

(1)
The observed half life for this reaction when the starting concentration is 6.71×10-2 M is _______ s and when the starting concentration is 3.36×10-2 M is s.

(2)
The average 1e502cd7-69d6-45ee-a32d-787ce5febae7.gif(1/[NOBr]) / 1e502cd7-69d6-45ee-a32d-787ce5febae7.gift from t = 0 s to t = 20.9 s is __________ M-1 s-1.
The average 1e502cd7-69d6-45ee-a32d-787ce5febae7.gif(1/[NOBr]) / 1e502cd7-69d6-45ee-a32d-787ce5febae7.gift from t = 20.9 s to t = 62.8 s is ___________ M-1 s-1.

(3)
Based on these data, the rate constant for this _______ pick one (zero, first or second) order reaction is _________ M-1 s-1.

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Answer #1

Given reaction NOBI - NO + Biz [NO B1].M) 6.71X10-2 3-36x10-2 1667X1027.40 x10- Seconds I o I 2019 | 6218 T 147 11 half lifeconcentration of NOBR at t=20,9 sec = 3.368102 contentration of No Br at t = 62,8 sec. = 1.68x10²4 average rate of reaction -

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