The isomerization of methyl isonitrile, CH3NC, to acetonitrile, CH3CN, was studied in the gas phase at 215oC, and the following data were ob

Question

The isomerization of methyl isonitrile, CH3NC, to acetonitrile, CH3CN, was studied in the gas phase at 215oC, and the following data were obtained: Time (s) [CH3NC] (M) 0 0.0165 2,000 0.0110 5,000 0.00591 8,000 0.00314 12,000 0.00137 15,000 0.00074 (a) Calculate the average rate of reaction, in M/s, for the time interval between each measurement.

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Euphemia 4 years 2021-08-31T08:57:51+00:00 1 Answers 147 views 0

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  1. Acacia
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    2021-08-31T08:59:05+00:00
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    Answer:

    2.75 × 10⁻⁶ M/s

    1.69 × 10⁻⁶ M/s

    9.23 × 10⁻⁻⁷ M/s

    4.43 × 10⁻⁻⁷ M/s

    2.1 × 10⁻⁻⁷ M/s

    Explanation:

    We have the following information for the isomerization of methyl isonitrile

    Time (s)      [CH₃NC] (M)

      0              0.0165

    2000          0.0110

    5000          0.00591

    8000          0.00314

    12000         0.00137

    15000         0.00074

    To calculate the average rate of reaction (r) for each interval, we need to use the following expression:

    r = -Δ[CH₃NC]/Δt

    Interval 0-2000 s

    r = – (0.0110 M-0.0165 M)/2000 s – 0 s = 2.75 × 10⁻⁶ M/s

    Interval 2000-5000 s

    r = – (0.00591 M-0.0110 M)/5000 s – 2000 s = 1.69 × 10⁻⁶ M/s

    Interval 5000-8000 s

    r = – (0.00314 M-0.00591 M)/8000 s – 5000 s = 9.23 × 10⁻⁻⁷ M/s

    Interval 8000-12000 s

    r = – (0.00137 M – 0.00314 M)/12000 s – 8000 s = 4.43 × 10⁻⁻⁷ M/s

    Interval 12000-15000 s

    r = – (0.00074 M – 0.00137 M)/15000 s – 12000 s = 2.1 × 10⁻⁻⁷ M/s

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