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  • consider an isomerisation of hexane to cyclehexane follows first order kinetics. At 700 k of a sample of hexane cha

consider an isomerisation of hexane to cyclehexane follows first order kinetics. At 700 k 85 % of a sample of hexane change to cyclohexane in 79 min. Calculate the value of rate constant (k)

Option: 1

3.66 \times 10^{-2}$ min $^{-1}


Option: 2

2.42 \mathrm{~min}^{-1}


Option: 3

1.04 \times 10^{-2}$ min $^{-1}


Option: 4

2.40 \times 10^{-2} \mathrm{~min}^{-1}


Answers (1)

best_answer

For first order reaction
\mathrm{k=\frac{2.303}{t} \log \left(\frac{(A)_{0}}{(A)-x}\right) }
\mathrm{k=\frac{2.303}{79} \log \left(\frac{100}{100-85}\right) }
\mathrm{k \approx 2.40 \times 10^{-2} \text { min }^{-1} }

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