Answer: leaves the position unchanged.
- A shifts it strongly forward
- B shifts it strongly backward
- C leaves the position unchanged
- D doubles the value of K
Correct answer: C. leaves the position unchanged
Explanation: At constant volume the partial pressures of the reacting gases are unchanged, so the equilibrium does not shift.
As the reaction proceeds, reactant concentration falls and product concentration rises until both level off at equilibrium.
Concept context
When forward and reverse reaction rates are equal, equilibrium is reached. Learn about Kc, Kp, Le Chatelier's principle, and acid-base equilibria, including pH, buffer solutions, and solubility product.