1 mole of A g is heated to 300- C in closed one litre vessel till the following equilibrium is reached- Ag- Bg- The equilibrium constant for the reaction at 300-C is 4- What is the concentration of B in mol- lit-1 at equilibrium-

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Standard XII

Chemistry

Equilibrium Constant and Standard Free Energy Change

1 mole of A g...

Question

1 mole of A (g) is heated to $300^{\circ} C$ in closed one litre vessel till the following equilibrium is reached: $A (g) \Leftrightarrow B (g)$ . The equilibrium constant for the reaction at $300^{\circ} C$ is 4. What is the concentration of B (in $m o l . l i t^{- 1}$ ) at equilibrium?

0.2

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Solution

The correct option is D 0.8
Initial concentration of $A$ is 1 M. Let $x$ represents the concentration of $B$ in the equilibrium mixture. The concentration of $A$ in the equilibrium mixture will be $1 - x$ . The expression for the equilibrium constant is $K = \frac{B}{A}$ .
Substitute values in the above expression.
$4 = \frac{x}{1 - x}$ .
Hence, $x = 0.8$ .

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1 mole of A (g) is heated to 300∘C in closed one litre vessel till the following equilibrium is reached: A(g)⇔B(g). The equilibrium constant for the reaction at 300∘C is 4. What is the concentration of B (in mol.lit−1) at equilibrium?

1 mole of A (g) is heated to $300^{\circ} C$ in closed one litre vessel till the following equilibrium is reached: $A (g) \Leftrightarrow B (g)$ . The equilibrium constant for the reaction at $300^{\circ} C$ is 4. What is the concentration of B (in $m o l . l i t^{- 1}$ ) at equilibrium?