Question

Consider two containers A and B where A is a rigid container and B is a container with a massless, frictionless piston that maintains constant pressure. NH₃ (g) is injected into both containers and allowed to come to equilibrium. At equilibrium, 2 atm of Argon gas is injected into each container. Explain any changes (up, down or no change) to the equilibrium concentrations of NH₃ , N₂ and H₂ ?

a) do the partial pressures of container A change or remain the same?

b) what happens to the volume in container B?

Answer 1

Consider two containers A and B where A is a rigid container and B is a container with a massless, frictionless piston that maintains constant pressure. NH₃ (g) is injected into both containers and allowed to come to equilibrium. At equilibrium, 2 atm of Argon gas is injected into each container. Explain any changes (up, down or no change) to the equilibrium concentrations of NH₃ , N₂ and H₂ ?

a) do the partial pressures of container A change or remain the same?

Solutio :- When the Ar is added to to the container A then it increases the pressure in the flask therefore the partial pressures of the N2 and H2 will increase which causes the equilibrium to shift to left side therefore at the new equilibrium partial pressure of the NH3 will increase and partial pressures of the H2 and N2 will decrease so the partial pressures in the container A will change.

b) what happens to the volume in container B?

Solution :- when the Ar is added to the container B then it will increase the volume of the container which will result in larger volume

So the volume of the container B will increase.