An equilibrium system for the reaction between hydrogen and iodine gas to give hydrogen iodide gas at 670 K in

Question

Activity 1. An equilibrium system for the reaction between hydrogen and iodine gas to give hydrogen iodide gas at 670 K in a 5L flask, contains 0.4 moles of hydrogen , 0.4 moles of iodine and 2.4 moles of hydrogen iodide. 

1. Write a reaction to depict this equilibrium.
2. Is this a homogeneous or heterogeneous equilibrium?
3. Write an equilibrium constant expression for the reaction. 
4. Write equilibrium constant for reverse reaction.
5. Write equilibrium constant for reaction if the stoichiometric coefficients are halved.
6. What will be the effect of increase in pressure on the equilibrium.
7. Calculate equilibrium constant.
8. What is the relation between Kp and Kc for the given equilibrium?

Activity 2. What will be the effect of increase in pressure and decrease in temperature on the following reaction

N₂ (g) + 3H₂ (g)  ⇄   2NH₃ (g) + 92.4 KJ

chem XI Q7