Chemistry Class 11 NCERT Solutions: Chapter 7 Equilibrium Part 10

Chemistry Class 11 NCERT Solutions Chapter 7 Equilibrium Part 10

Q: 27. Find the equilibrium constant for the following reaction is Equation at Equation

Equation

Find the equilibrium pressure of all gases if 10.0 bar of Equation is introduced into a sealed container at 1024 K.

Answer: Given,

Equation

Therefore, for the reaction Equation the equilibrium constant will be,

Equation

Equation

Equation

Now, let p be the pressure of both H2 and Equation at equilibrium.

Equation

Now, we can write,

Equation

Equation

Equation

Equation

Equation

Equation

Equation

Therefore, at equilibrium,

Equation

Equation

Equation

Q: 28. Dihydrogen gas is obtained from natural gas by partial oxidation with steam as per following endothermic reaction:

Equation

(A) Write as expression for Equation for the above reaction.

(B) How will the values of Equation

(i) Increasing the pressure

(ii) Increasing the temperature

(iii) Using a catalyst?

Answer:

(A) For the given reaction,

Equation

(B) (i) According to Le chatelier’s principle, the equilibrium will shift in the backward direction

(ii) According to Le Chatelier’s principle, as the reaction is endothermic, the equilibrium will shift in the forward direction

(iii) The equilibrium of the reaction is not affected by the presence of a catalyst. A catalyst only increases the rate of a reaction. Thus equilibrium will be attained quickly.

Q: 29. Describe the effect of

(A) Addition of Equation

(B) Addition of Equation

(C) Removal of Equation

(D) Removal of Equation

On the equilibrium of the reaction

Equation

Answer:

(A) According to Le Chatelier’s Principle, on addition of Equation the equilibrium of the given reaction will shift in the forward direction

(B) On addition of Equation the equilibrium will shift in the backward direction

(C) On removing Equation equilibrium will shift in the backward direction

(D) On removing Equation , the equilibrium will shift in the forward direction

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