Phosphorus tribromide decomposes to form phosphorus and bromine, like this: 4pbr3 (g) → p4 (g) + 6br2 (g) write the pressure equilibrium constant expression for this reaction
Chemical reaction: 4PBr₃(g) → P₄(g) + 6Br₂(g). Pressure equilibrium constant (Kp) express the relationship between product pressures and reactant pressures. The partial pressures of gases are used to calculate pressure equilibrium constant. Kp = (p(P₄) · p(Br₂)⁶) ÷ p(PBr₃)⁴. p(P₄) - partial pressure of phosphorus. p(Br₂) - partial pressure of bromine.
