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Standard XII

Chemistry

Characteristics of Equilibrium Constant

Determine the...

Question

Determine the value of equilibrium constant $(K_{C}$ for the reaction
$A A_{2} (g) + B_{2} (g) ⇌ 2 A B (g)$ If 10 moles of $A_{2} : 15$ moles of $B_{2}$ and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M

4.5

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1.5

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0.6

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None of these

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Solution

The correct option is A 4.5
$A_{2} (g) + B_{2} (g) ⇌ 2 A B (g)$
Initial conc. $10 / 2$ $15 / 2$ $5 / 2$
at eqn $5 - x$ $7.5 - x$ $2.5 + 2 x$
$∵ 2.5 + 2 x = 7.5$
$\Rightarrow x = 2.5$
$K_{c} = \frac{(7.5)^{2}}{2.5 \times 5} = 4.5$

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Similar questions

Q. Determine the value of equilibrium constant

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Q. In the reaction

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What will be the equilibrium concentration of AB?

Q. The reaction

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Initial conc.	$10 / 2$	$15 / 2$	$5 / 2$
at eqn	$5 - x$	$7.5 - x$	$2.5 + 2 x$

Determine the value of equilibrium constant (KC for the reactionAA2(g)+B2(g)⇌2AB(g) If 10 moles of A2:15 moles of B2 and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M

The correct option is A 4.5A2(g)+B2(g)⇌2AB(g)Initial conc.10/215/25/2at eqn 5−x7.5−x2.5+2x∵2.5+2x=7.5⇒x=2.5Kc=(7.5)22.5×5=4.5

Determine the value of equilibrium constant $(K_{C}$ for the reaction
$A A_{2} (g) + B_{2} (g) ⇌ 2 A B (g)$ If 10 moles of $A_{2} : 15$ moles of $B_{2}$ and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M

The correct option is A 4.5
$A_{2} (g) + B_{2} (g) ⇌ 2 A B (g)$
Initial conc. $10 / 2$ $15 / 2$ $5 / 2$
at eqn $5 - x$ $7.5 - x$ $2.5 + 2 x$
$∵ 2.5 + 2 x = 7.5$
$\Rightarrow x = 2.5$
$K_{c} = \frac{(7.5)^{2}}{2.5 \times 5} = 4.5$