1. Tardigrade
  2. Question
  3. Chemistry
  4. In the reaction of formation of sulphur trioxide by contact process 2SO2 + O2 leftharpoons 2SO3 the rate of reaction was measured as (d[O2]/dt) = 2.5×10-4mol L-1 s-1. The rate of reaction in terms of [SO2] in mol L-1s-1 will be :

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Q. In the reaction of formation of sulphur trioxide by contact process $2SO_{2} + O_{2} {\rightleftharpoons} 2SO_{3}$ the rate of reaction was measured as $\frac{d\left[O_{2}\right]}{dt} = 2.5\times10^{-4}mol \,L^{-1} \,s^{-1}.$ The rate of reaction in terms of $[SO_2]$ in mol $L^{-1}s^{-1}$ will be :

JEE MainJEE Main 2014Chemical Kinetics

Solution:

$-\frac{1}{2}\frac{d}{d t} \left[SO_{2}\right]=-\frac{d}{d t} \left[O_{2}\right]$

$\Rightarrow \quad\frac{d}{d t} \left[So_{2}\right]=-2\times2.5\times10^{-4}$

$=-5\times10^{-4}$