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The variables Pressure, Volume, Concentration and Temperature may change the State of Equilibrium. The change is governed by the Le-Chatelier’s principle. The decomposition of NH3(g) can be made spontaneous by increasing the temperature and lowering pressure. In the reaction, removal of any product from the reaction mixture makes the reversible reaction irreversible and therefore, reaction proceeds to completion. Answer the given questions (i) to (iv).
Q. Change in free energy for the equilibrium, gaseous reaction, PCl5 → PCl3 + Cl2 on addition of an inert gas at constant pressure and at constant volume is respectively:
  • a)
    decrease, no change
  • b)
    increase, no change
  • c)
    no change, no change
  • d)
    no change, decrease
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The variables Pressure, Volume, Concentration and Temperature may cha...
Addition of inert gas at constant volume has no effect on any equilibrium reaction. When inert gas is added at constant pressure in the given reaction, it proceeds in forward direction. DG° remains constant, but DG decreases as the reaction proceeds spontaneously in forward direction to attain equilibrium.
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Most Upvoted Answer
The variables Pressure, Volume, Concentration and Temperature may cha...
Change in Free Energy for the Equilibrium Reaction

Constant Pressure:
- Addition of an inert gas at constant pressure will not change the free energy of the equilibrium reaction, PCl5 → PCl3 + Cl2.
- This is because the addition of an inert gas does not affect the partial pressures of the reactants and products, which are the factors that determine the free energy of the reaction.

Constant Volume:
- On the other hand, addition of an inert gas at constant volume will decrease the free energy of the equilibrium reaction, PCl5 → PCl3 + Cl2.
- This is because at constant volume, the addition of an inert gas will increase the total pressure in the system.
- According to Le Chatelier's principle, the equilibrium will shift in the direction that reduces the total number of gas molecules.
- In this case, the reaction will shift towards the side with fewer gas molecules (reactants), resulting in a decrease in free energy.
Therefore, the change in free energy for the equilibrium reaction, PCl5 → PCl3 + Cl2, on addition of an inert gas at constant pressure is no change, while at constant volume, it will decrease.
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The variables Pressure, Volume, Concentration and Temperature may change the State of Equilibrium. The change is governed by the Le-Chatelier’s principle. The decomposition of NH3(g) can be made spontaneous by increasing the temperature and lowering pressure. In the reaction, removal of any product from the reaction mixture makes the reversible reaction irreversible and therefore, reaction proceeds to completion. Answer the given questions (i) to (iv).Q. Change in free energy for the equilibrium, gaseous reaction, PCl5 → PCl3 + Cl2 on addition of an inert gas at constant pressure and at constant volume is respectively:a)decrease, no changeb)increase, no changec)no change, no changed)no change, decreaseCorrect answer is option 'A'. Can you explain this answer?
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The variables Pressure, Volume, Concentration and Temperature may change the State of Equilibrium. The change is governed by the Le-Chatelier’s principle. The decomposition of NH3(g) can be made spontaneous by increasing the temperature and lowering pressure. In the reaction, removal of any product from the reaction mixture makes the reversible reaction irreversible and therefore, reaction proceeds to completion. Answer the given questions (i) to (iv).Q. Change in free energy for the equilibrium, gaseous reaction, PCl5 → PCl3 + Cl2 on addition of an inert gas at constant pressure and at constant volume is respectively:a)decrease, no changeb)increase, no changec)no change, no changed)no change, decreaseCorrect answer is option 'A'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The variables Pressure, Volume, Concentration and Temperature may change the State of Equilibrium. The change is governed by the Le-Chatelier’s principle. The decomposition of NH3(g) can be made spontaneous by increasing the temperature and lowering pressure. In the reaction, removal of any product from the reaction mixture makes the reversible reaction irreversible and therefore, reaction proceeds to completion. Answer the given questions (i) to (iv).Q. Change in free energy for the equilibrium, gaseous reaction, PCl5 → PCl3 + Cl2 on addition of an inert gas at constant pressure and at constant volume is respectively:a)decrease, no changeb)increase, no changec)no change, no changed)no change, decreaseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The variables Pressure, Volume, Concentration and Temperature may change the State of Equilibrium. The change is governed by the Le-Chatelier’s principle. The decomposition of NH3(g) can be made spontaneous by increasing the temperature and lowering pressure. In the reaction, removal of any product from the reaction mixture makes the reversible reaction irreversible and therefore, reaction proceeds to completion. Answer the given questions (i) to (iv).Q. Change in free energy for the equilibrium, gaseous reaction, PCl5 → PCl3 + Cl2 on addition of an inert gas at constant pressure and at constant volume is respectively:a)decrease, no changeb)increase, no changec)no change, no changed)no change, decreaseCorrect answer is option 'A'. Can you explain this answer?.
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