List of top Chemistry Questions on Homogeneous Equilibria

At a certain temperature and total pressure of 105 Pa, iodine vapour contains 40% by volume of \(\text {I}\) atoms
\( I_2 (g) ⇋ 2I (g)\)
Calculate Kp for the equilibrium.
A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI(g) is 0.04 atm. What is Kp for the given equilibrium ?
\(2HI (g) ⇋ H_2 (g) + I_2 (g)\)
Kp = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C2H6 when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium?
\(C_2H_6 (g) ⇋ C_2H_4 (g) + H_2 (g)\)
Dihydrogen gas is obtained from natural gas by partial oxidation with steam as per following endothermic reaction:
\(CH_4 (g) + H_2O (g) ⇋ CO (g) + 3H_2 (g)\)
  1. Write as expression for Kp for the above reaction.
  2. How will the values of Kp and composition of equilibrium mixture be affected by
    1. increasing the pressure
    2. increasing the temperature
    3. using a catalyst?
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 CO and H2. In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction,
\(CO (g) + H_2O (g) ⇋ CO_2 (g) +H_2 (g)\)
If a reaction vessel at 400°C is charged with an equimolar mixture of CO and steam such that \(P_{co}= P_{H_2O} = 4.0\) bar, what will be the partial pressure of H2 at equilibrium? Kp= 10.1 at 400°C.