Which way will the equilibrium shift, for the exothermic reaction below, if additional SO3(g) is added (and everything else is held constant)? 2SO2(g) + O2(g) Equilibrium arrow.jpg 2SO3(g) Group of answer choices To the left (more reactants) To the right (more products) It will not shift
Question
Which way will the equilibrium shift, for the exothermic reaction below, if additional SO3(g) is added (and everything else is held constant)?
2SO2(g) + O2(g) Equilibrium arrow.jpg 2SO3(g)
Group of answer choices
To the left (more reactants)
To the right (more products)
It will not shift
Solution
The equilibrium will shift to the left (more reactants). This is because according to Le Chatelier's principle, if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change. In this case, by adding more SO3(g), the system will try to reduce the concentration of SO3(g) by shifting the equilibrium to the left to produce more reactants (2SO2(g) + O2(g)).
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