Question

Two solid compounds X and Y dissociates at a certain temperature as follows

X(s) $\rightleftharpoons$A(g) + 2B(g) ; Kp1= 9 × 10–3atm3

Y(s) $\rightleftharpoons$2B(g) + C(g) ; Kp2= 4.5 × 10–3atm3

The total pressure of gases over a mixture of X and Y is :

• A. 4.5 atm
• B. 0.45 atm
• C. 0.6 atm
• D. None of these

Answer 1

Answer: (B)

0.45 atm

Answer 2

Let x is partial pressure of A and y is partial pressure of C when both equilibrium simultaneously established in a vessel

X(s) A(g) + 2B(g)

x (2x + 2y) ;

Y(s) C(g) + 2B(g)

y (2y + 2x) ;