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2 June, 04:13

For the gas phase decomposition of 1-bromopropane, CH3CH2CH2BrCH3CH=CH2 + HBr the rate constant at 622 K is 6.43*10-4 / s and the rate constant at 666 K is 8.28*10-3 / s. The activation energy for the gas phase decomposition of 1-bromopropane is

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  1. 2 June, 04:27
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    Answer is: activation energy of this reaction is 212,01975 kJ/mol.

    Arrhenius equation: ln (k ₁/k₂) = Ea/R (1/T₂ - 1/T₁).

    k ₁ = 0,000643 1/s.

    k ₂ = 0,00828 1/s.

    T₁ = 622 K.

    T₂ = 666 K.

    R = 8,3145 J/Kmol.

    1/T₁ = 1/622 K = 0,0016 1/K.

    1/T ₂ = 1/666 K = 0,0015 1/K.

    ln (0,000643/0,00828) = Ea/8,3145 J/Kmol · (-0,0001 1/K).

    -2,55 = Ea/8,3145 J/Kmol · (-0,0001 1/K).

    Ea = 212019,75 J/mol = 212,01975 kJ/mol.
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