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Ellingham Diagram

A reaction wa...

Question

A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will______.

A

be tripled.

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B

increase by a factor of 4

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C

be doubled.

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D

remain unchanged.

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Solution

The correct option is B increase by a factor of 4
The rate law expression is $R = k [C O]^{2}$ .

When concentration of $C O$ is doubled, the rate law expression becomes $R^{'} = k [2 C O]^{2} = 4 k [C O]^{2} = 4 R$ .

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