Consider the reaction represented by the equation: 2SO $_{2(g)}$ + O $_{2(g)}$ ⇌ 2SO $_{3(g)}$ ; ∆H = - 197 kJmol $^{-1}$ . Which of the following conditions will not increase the yield of sulphur (VI) oxide?

Increase in temperature

Decrease in temperature

Increase in pressure

Addition of O₂ into the mixture

Correct answer is A

The reaction is an exothermic reaction (∆H=-197kjmol).
For continual yield of sulphur(IV)oxide, heat must be liberated.
So,increasing the temperature of the reaction will lead to reduction in yield of $SO_3$ since it favours backward reaction which is endothermic.

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Consider the reaction represented by the equation: 2SO $_{2(g)}$ + O $_{2(g)}$ ⇌ 2SO $_{3(g)}$ ; ∆H = - 197 kJmol $^{-1}$ . Which of the following conditions will not increase the yield of sulphur (VI) oxide?

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Consider the reaction represented by the equation: 2SO2(g)_{2(g)} + O2(g)_{2(g)} ⇌ 2SO3(g)_{3(g)}; ∆H = - 197 kJmol−1^{-1}. Which of the following conditions will not increase the yield of sulphur (VI) oxide?

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Aptitude Tests

Consider the reaction represented by the equation: 2SO $_{2(g)}$ + O $_{2(g)}$ ⇌ 2SO $_{3(g)}$ ; ∆H = - 197 kJmol $^{-1}$ . Which of the following conditions will not increase the yield of sulphur (VI) oxide?