Chemistry | MHT CET 2016 | Discussion Page

Average rate of reaction for the following reaction $2SO_{2}(g)+O_{2}(g)\rightarrow 2SO_{3}(g)$ is written as

$\frac{\triangle[SO_{2}]}{\triangle t}$

$-\frac{\triangle[O_{2}]}{\triangle t}$

$\frac{1}{2}\frac{\triangle[SO_{2}]}{\triangle t}$

$\frac{\triangle[SO_{3}]}{\triangle t}$

Option B

The average rate of reaction is defined as the speed with which the reactants are converted into products

For reaction,

$2SO_{2}(g)+O_{2}(g)\rightarrow 2SO_{3}(g)$

$-\frac{1}{2}\frac{\triangle[SO_{2}]}{\triangle t}=\frac{-\triangle[O_{2}]}{\triangle t}=+\frac{1}{2}\frac{\triangle[SO_{3}]}{\triangle t}$

So, average rate of reaction is written as $-\frac{\triangle[O_{2}]}{\triangle t}$

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