NEET Chemistry Chemical Kinetics Questions Solved

For the reaction, ${C}_{2}{H}_{5}I+O{H}^{-}\to {C}_{2}{H}_{5}OH+{I}^{-}$ the rate constant was found to have a value of $5.03×{10}^{-2}mo{l}^{-1}d{m}^{3}{s}^{-1}$ at 289 K and 6.71 at 333 K.

What is the rate constant at 305 K ?

(B)

$\mathrm{log}\left(\frac{6.71}{5.03×{10}^{-2}}\right)=\frac{{E}_{a}}{2.303×8.314}\left(\frac{333-289}{333×289}\right)$

On solving we get, ${E}_{a}$= 88.914 kJ The rate constant at 305 K may be determined from the relation,

$\mathrm{log}\left(\frac{{k}_{3}}{5.03×{10}^{-2}}\right)=\frac{88.914}{2.303×8.314}\left(\frac{1}{298}-\frac{1}{305}\right)$

On solving we get,

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