For the equilibrium PCl5(g) ---- PCl3(g) + Cl2(g), the equilibrium constant Kp h
ID: 850950 • Letter: F
Question
For the equilibrium PCl5(g) ---- PCl3(g) + Cl2(g), the equilibrium constant Kp has the value 0.497 at 500 K. A gas cylinder at 500 K is charged with PCl5(g) at an initial pressure of 1.66 atm. What are the equilibrium pressures of PCl5, PCl3, and Cl2 at this temp? For the equilibrium PCl5(g) ---- PCl3(g) + Cl2(g), the equilibrium constant Kp has the value 0.497 at 500 K. A gas cylinder at 500 K is charged with PCl5(g) at an initial pressure of 1.66 atm. What are the equilibrium pressures of PCl5, PCl3, and Cl2 at this temp?Explanation / Answer
PCl5(g) ---- PCl3(g) + Cl2(g)
1.66 .........0...............0
1.66-X.......X..............X
Kp = X^2 / (1.66 - X)
=> 0.497 = X^2 / (1.66 - X)
=> X = 0.693 atm
Equilibrium pressure of Cl2 = PCl3 = x = 0.693 atm
Eq pressure of PCl5 = 1.66 - 0.693 = 0.967 atm