Question

Consider this reaction: 2SO2 (g) + O2 (g) 2SO3 (g) + heat. What will happen if more sulfur trioxide gas is added to the reaction mixture?
A-The equilibrium will shift toward the products.
B-The equilibrium will shift toward the reactants.
C-Keq will increase.
D-Keq will decrease.
E-There will be no shift in equilibrium.

Answer 1

Answer: B-The equilibrium will shift toward the reactants.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

For the given equation:

$2SO_2+O_2\rightleftharpoons 2SO_3+heat$

Given: when more $SO_3$ is added

If the concentration of $SO_3$ that is the product is increased, so according to the Le-Chatlier's principle, the equilibrium will shift in the direction where decrease of concentration of $SO_3$ takes place.

Therefore, the equilibrium will shift in the left direction or towards reactants.

Answer 2

I think the correct answer from the choices listed above is option B. When more sulfur trioxide gas is added to the reaction mixture, then the equilibrium will shift toward the reactants. Hope this answers the question. Have a nice day. Feel free to ask more questions.