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
The correct answer is: A
Explanation
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.