Final answer:
The basic equilibrium equation for the formation of ammonia from nitrogen and hydrogen gases is 3 H₂(g) + N₂(g) ⇌ 2 NH₃(g), and the equilibrium constant expression is K = ⁄ (pNH₃²) / (pN₂ × pH₂2³).
Step-by-step explanation:
The basic equilibrium equation for the reaction of nitrogen (N₂) and hydrogen (H₂) to form ammonia (NH₃) can be written as follows:
3 H₂(g) + N₂(g) ⇌ 2 NH₃(g)
At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction, and the concentrations of the reactants and products remain constant. The equilibrium constant expression for this reaction is given by the following equation:
K = ⁄ (pNH₃²) / (pN₂ × pH₂2³)
Where 'K' represents the equilibrium constant, pNH₃ is the partial pressure of ammonia, pN₂ is the partial pressure of nitrogen, and pH₂ is the partial pressure of hydrogen. It describes how the partial pressures of each gas involved in the reaction relate to one another at equilibrium.