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Q.

The temperature coefficient of a reaction is 2. Calculate rate of disappearance at a temperature of 450K if rate constant at 400K is $4 \times 10^{- 2} M^{- 1} \sec^{- 1}$ , when concentration of reaction is 2 moles per litre.

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a

$2.56 M \sec^{- 1}$

b

$8 \times 10^{- 2} M \sec - 1$

c

$1.28 M \sec - 1$

d

$5.12, M \sec^{- 1}$

answer is B.

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Detailed Solution

The rate disappearance,

$\begin{array}{l} r = K \times [A]^{2} \\ r = 4 \times 10^{- 2} \times 2^{5} \times 2^{2} \\ r = 5.12 {Msec}^{- 1} \end{array}$

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The temperature coefficient of a reaction is 2. Calculate rate of disappearance at a temperature of 450K if rate constant at 400K is 4×10−2M−1sec−1, when concentration of reaction is 2 moles per litre.