For the exothermic formation of sulphur trioxide from sulphur dioxide and oxygen in gas phase
          

(i) write the expression for the equilibrium constant for the reaction;
(ii) at room temperature (300 K) will K_p be greater than, less than or equal to K_p at 900 K;
(iii) how will the equilibrium be affected if the volume of the vessel containing the three gases is reduced, keeping the temperature constant; what happens;
(iv) what is the effect of adding 1 mole He(g) to a flask containing SO₂,O₂ and SO₃ at equilibrium at constant temperature?

The dissociation of phosgene is represented as follows:



When the mixture of these three gases is compressed at constant temperature, what happens to:
(i) the amount of CO in the mixture.
(ii) the partial pressure of COCl₂
(iii) the equilibrium constant for the reaction?

For the equilibrium  the value of the equilibrium constant K_C is   Calculate K_p for the reaction at this temperature.

For the equilibrium

the value of the constant, K_c is  Calculate  for the reaction at this temperature.
    

The value of Kc for the reaction  is found to be 186.9 at 750K. Calculate the value of  if partial pressures are expressed in bars.
        

The equilibrium constant at 278K for  is . In a solution in which copper has displaced some silver ions from the solution, concentration of Cu²⁺ ions is 1.8 x 10^-2 mol L^-1 and the concentration of Ag⁺ ions is 3·0 ×10^–9 mol L^–1. Is the system at equilibrium?