Question

The system below was at equilibrium and

then some SO3 gas was added to the
container. What change will occur for the
system?
2SO2(g) + O₂(g) = 2SO3(g) + 198 kJ
A. The reaction will shift toward the products (right) and
increase the concentration of O2.
B. The reaction will shift toward the products (right) and
decrease the concentration of SO2.
C. The reaction will shift toward the reactants (left) and
increase the concentration of SO3.
D. The reaction will shift toward the reactants (left) and
increase the concentrations of SO₂ and O2.

Answer 1

Answer: D) The reaction will shift toward the reactants (left) and

increase the concentrations of SO₂ and O2.

Step-by-step explanation:

When So3 is added at equilibrium, the system sees there is too much SO3 and will shift away from SO3 in order to use up the excess SO3. If the reaction shifts right, it would only add to the excess SO3. The reaction will shift left and that will make more of the reactants SO2 and O2.