Chemistry Class 11 NCERT Solutions: Chapter 7 Equilibrium Part 4

Chemistry Class 11 NCERT Solutions Chapter 7 Equilibrium Part 4

Q: 11. A sample of Equation is placed in flask at a pressure of Equation m. At equilibrium the partial pressure of Equation is 0.04 atm. What is Equation for the given equilibrium?

Equation

Image of Equilibrium Constant for Reaction

Image of Equilibrium Constant for Reaction

Image of Equilibrium Constant for Reaction

Answer:

The initial concentration of HI is 0.2 atm. At equilibrium, it has a partial pressure of 0.04 atm. Therefore, a decrease in the pressure of HI is 0.2 – 0.04 = 0.16. The given reaction is:

Equation

Therefore,

Equation

Equation

Equation

Equation

Hence, the value of Equation for the given equilibrium is 4.0.

Q: 12. A mixture of 1.57 mol of Equation 1.92 mol of Equation and 8.13 mol of Equation is introduced into a 20 L reaction vessel at 500 K. At this temperature, the equilibrium constant, Equation for the reaction Equation is Equation Is the reaction mixture at equilibrium? If not, what is the direction of the net reaction?

Image of Keq-Homogeneous Equilibrium

Image of Keq-Homogeneous Equilibrium

Image of Keq-Homogeneous Equilibrium

Answer:

The given reaction is:

Equation

The given concentration of various species is

Equation Equation

Equation

Now, reaction quotient Equation is:

Equation

Equation

Equation

Since, Equation , the reaction mixture is not at equilibrium.

Again, Equation . Hence, the reaction will proceed in the reverse direction.

Q: 13. The equilibrium constant expression for a gas reaction is,

Equation

Write the balanced chemical equation corresponding to this expression.

Answer:

The balanced chemical equation corresponding to the given expression can be written as:

Equation

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