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  4. In contact process the formation of SO3 takes place according to the following reaction, 2SO2+O2leftharpoons2SO3;Δ H=-45.2kcal The formation of SO3 is favoured by

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Q. In contact process the formation of $SO_{3}$ takes place according to the following reaction,
$2SO_{2}+O_{2}\rightleftharpoons2SO_{3};\Delta H=-45.2kcal$
The formation of $SO_{3}$ is favoured by

NTA AbhyasNTA Abhyas 2022

Solution:

In this reaction $\Delta H$ is negative so reaction move forward by decrease in temperature while value of $\Delta n=2-3=-1$ i.e., negative so the reaction move forward by increase in pressure.