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Standard XI

Chemistry

Characteristics of Equilibrium Constant

For the equil...

Question

For the equilibrium at $27^{o} C .$
$L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g); K_{P} = 9 a t m^{2}$
A 24.63 litre flask contain 1 mol $L i C l . N H_{3} .$ How many moles of $N H_{3}$ should be added to flask at this temperature to drive the backward reaction for completion.

5 moles

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8 moles

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3 moles

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2 moles

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Solution

The correct option is A 5 moles
Given: $K_{P} = 9 a t m^{2}$ = $P_{N H_{3}}^{2}$
$P_{N H_{3}} = 9 a t m^{2}$
$P_{N H_{3}} = 3 a t m$
Using, PV = nRT
$3 \times 24.63 = n_{N H_{3}} \times R \times 300$
$n_{N H_{3}} = 3$ (at equilibrium)
$L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g)$
1 n
0 n - 2
Now, we know, $n - 2 = 3$
n = 5 moles

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Similar questions

Q. For the equilibrium at

27^{o} C .

L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g); K_{P} = 9 a t m^{2}

A 24.63 litre flask contain 1 mol

L i C l . N H_{3} .

How many moles of

N H_{3}

should be added to flask at this temperature to drive the backward reaction for completion.

Q. For the equilibrium:

L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g) K_{p} = 9 a t m^{2}

27^{o} C

, a 8.2 L vessel contains 0.1 mol of

L i C l . N H_{3} (s)

. How many moles of

N H_{3}

should be added to the flask at this temperature to drive the backward reaction to completion? (Take R= 0.082 atm-L/molK)

Q. For the equilibrium

L i C l . 3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g);

K_{p} = 9 a t m^{2}

37^{\circ} C .

5 L

vessel contains

0.1

mole of

L i C l . N H_{3}

. How many moles of

N H_{3}

should be added to the flask at this temperature to derive the backward reaction for completion?
Use :

R = 0.082 {atm L mol}^{- 1} K^{- 1}

Q. For the equilibrium

L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g)

K_{P}

9 a t m^{2}

27^{o} C

. A

82.1 L

vessel contains

0.1

mole

L i C l . N H_{3}

3

atm. How many moles of

N H_{3}

would be required at the same temperature to drive the backward reaction for near completion?

Q. For the equilibrium :

L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g), K p = 9 a t m^{2} a t 27^{\circ} C

. A 4.92 litre vessel contains 0.1 mole of

L i C l . N H_{3}

. The number of moles of

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should be added to the flask at this temperature to drive the back ward reaction for completion is

(0.2 \times y)

. The value of ‘y’ is ___

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Characteristics of Equilibrium Constant

Standard XI Chemistry

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For the equilibrium at 27oC. LiCl.3NH3(s)⇌LiCl.NH3(s)+2NH3(g);KP=9 atm2 A 24.63 litre flask contain 1 mol LiCl.NH3. How many moles of NH3 should be added to flask at this temperature to drive the backward reaction for completion.

The correct option is A 5 moles Given: KP=9 atm2 = P2NH3 PNH3=9 atm2 PNH3=3 atm Using, PV = nRT 3×24.63=nNH3×R×300 nNH3=3 (at equilibrium) LiCl.3NH3(s)⇌LiCl.NH3(s)+2NH3(g) 1 n 0 n - 2 Now, we know, n−2=3 n = 5 moles

For the equilibrium at $27^{o} C .$
$L i C l .3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g); K_{P} = 9 a t m^{2}$
A 24.63 litre flask contain 1 mol $L i C l . N H_{3} .$ How many moles of $N H_{3}$ should be added to flask at this temperature to drive the backward reaction for completion.