A vessel initially contains pure A at a pressure of 1.0 bar. The total pressure of all gases at equilibrium is 1.5 bar. What is K for this reaction?

A (g) <--> B (g) + C (g)

1 answer

........A--> B + C
I......1.0...0...0
C......-p....p...p
E.....1.0-p..p...p

Total P = 1-p+p+p = 1.5
Solve for p, evaluate 1-p, substitute into Kp expression and solve for Kp.