On the basis of Le- Chatellier's principle ,discuss the condition for obtaining the maximum yield of `SO_3` in the following reactions :
` 2SO_2 (g) + O_2(g) hArr 2SO_3(g) , Delta H =- 42 ` k cal

Explanation

To determine the conditions for obtaining the maximum yield of \( SO_3 \) in the reaction:

\[ 2SO_2 (g) + O_2(g) \rightleftharpoons 2SO_3(g) \quad \Delta H = -42 \text{ kcal} \]

we will apply Le Chatelier's principle, which states that if an external change is applied to a system at equilibrium, the system will adjust itself to counteract that change and restore a new equilibrium.

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