Chemistry Equilibrium Problem

Question

At a particular temperature the following system is at equilibrium in a closed container:

2NOCl(g)  2NO(g) + Cl₂(g)

Analysis of the equilibrium mixture shows it to have the following composition:

P_NOCl = 1.25 atm

P_NO = 1.75×10^-2 atm

P_Cl2 = 0.390 atm

Calculate the value of K_p for this system at this temperature.

Answer 1

2NOCl(g)  <==>  2NO(g) + Cl₂(g)

1.25 atm...........1.75x10^-2.......0.390.......equilibrium pressures

Kp = (NO)²(Cl₂) / (NOCl)²

Kp = (1.75x10^-2)²(0.390) / (1.25)²

Kp = 7.64x10^-5