Chemistry Class 11 NCERT Solutions: Chapter 7 Equilibrium Part 11

Chemistry Class 11 NCERT Solutions Chapter 7 Equilibrium Part 11

Q: 30. At 473 K, equilibrium constant Equation for decomposition of phosphorus pentachloride, Equation is Equation . If decomposition is depicted as,

Equation Equation

Image of Equilibrium Calculations

Image of Equilibrium Calculations

Image of Equilibrium Calculations

(A) Write an expression for Equation for the reaction

(B) What is the value of Equation for the reverse reaction at the same temperature?

(C) What would be the effect on Equation if (i) more Equation is added (ii) pressure is increased? (iii) The temperature is increased?

Answer:

(A) Equation

(B) Value of Equation for the reverse reaction at the same temperature is:

Equation

Equation

(C) (i) Equation would remain the same because in this case, the temperature remains the same.

(ii) Equation is constant at constant temperature. Thus, in this case, Equation would not change.

(iii) In an endothermic reaction, the value of Equation increases with an increase in temperature. Since the given reaction in an endothermic reaction, the value of Equation will increase if the temperature is increased.

Q: 31. Dihydrogen gas used in Haber’s process is produced by reacting methane from natural gas with high temperature steam. The first stage of two stage reaction involves the formation of Equation . Second stage, Equation formed in first stage is reacted with more steam in water gas shift reaction,

Equation

If a reaction vessel at Equation is charged with an equimolar mixture of CO and steam such that Equation bar, what be the partial pressure of Equation at equilibrium? Equation

Answer:

Let the partial pressure of both carbon dioxide and hydrogen gas be p. The given reaction is

Equation

It is given that Equation

Now,

Equation

Equation

Equation

Equation

Equation

Equation

Hence, at equilibrium, the partial pressure of Equation will be 3.04 bar.

Q: 32. Predict which of the following reaction will have appreciable concentration of reactants and products:

Image of Concentration of Reactants and Products

Image of Concentration of Reactants and Products

Image of Concentration of Reactants and Products

(A) Equation

(B) Equation

(C) Equation

Answer: If the value of Equation lies between Equation a reaction has appreciable concentration of reactants and products. Thus, the reaction given in (c) will have appreciable concentration of reactants and products

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