Question

The gas A₂ in the left flask allowed to react with gas B₂ present in right flask as

A₂(g) + B₂ (g) $\rightleftharpoons$2 AB(g) ; K_C = 4 at 27ºC

What is the concentration of AB when equilibrium is

established –

• A. 1.33M
• B. 2.66M
• C. 0.66M
• D. 0.33M

Answer 1

Answer: (C)

0.66M

Answer 2

A₂ + B₂ $\rightleftharpoons$ 2AB

t = 0 2 4 0

at equi. 2–x 4–x 2x

4 = $\frac { 4 x ^ { 2 } } { ( 2 - x ) ( 4 - x ) }$

̃ x² = 8 – 6x + x²

̃ x = 8/6 = 1.33

̃ [AB] = = 0.66