At a certain temperature and pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms. The Kp for the equilibrium of the reaction would be:

1. 2.67 $×$ 10Pa

2. 1.00 $×$ 10Pa

3. 3.63 $×$ 10Pa

4. 2.18 $×$ 105 Pa

Subtopic:  Kp, Kc & Factors Affecting them |
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Given the reaction 2HI (g) $⇌$ H2 (g) + I2 (g)

A sample of HI(g) is placed in a flask at a pressure of 0.2 atm. At equilibrium, the partial pressure of HI(g) is 0.04 atm.  The ${\mathrm{K}}_{\mathrm{P}}$ for the given equilibrium would be:

 1 2 2 3.5 3 4 4 2.6
Subtopic:  Kp, Kc & Factors Affecting them |
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A mixture of 1.57 mol of N2, 1.92 mol of H2, and 8.13 mol of NH3 is introduced into a 20 L vessel at 500 K. At this temperature, the equilibrium constant, Kc for the reaction N2 (g) + 3H2 (g) $⇌$ 2NH3 (g) is 1.7 × 102.

The direction of the net reaction is:

1. Reaction is at equilibrium.

2. Reaction will proceed in forwarding direction.

3. Reaction will proceed in the backward direction.

4. Data is not sufficient.

Subtopic:  Kp, Kc & Factors Affecting them |
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Given the reaction:

2BrCl (g) $⇋$ Br2 (g) + Cl2 (g); Kc= 32 at 500 K. If the initial concentration of BrCl is 3.3 × 10-3 mol L–1, the molar concentration of BrCl in the mixture at equilibrium would be:

1. 3.0 $×$ 10-2 molL-1

2. 2.0 $×$ 10-4 molL-1

3. 2.5 $×$ 10-6 molL-1

4. 3.0 $×$ 10-4 molL-1

Subtopic:  Kp, Kc & Factors Affecting them |
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For the reaction, NO(g) + 1/2O2 (g) NO2(g)

fG° (NO2) = 52.0 kJ/mol , ∆fG° (NO) = 87.0 kJ/mol and
fG° (O2) = 0 kJ/mol.
The equilibrium constant for the formation of NO2 from NO and O2 at 298K would be:

 1 2.36 $×$ 104 2 3.10 $×$ 107 3 1.36 $×$ 10${}^{6}$ 4 2.18 $×$ 10${}^{5}$
Subtopic:  Kp, Kc & Factors Affecting them |
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The equilibrium constant for the following reaction is 1.6 ×105 at 1024K

H2(g) + Br2(g)  $⇋$2HBr(g)

If HBr at pressure 10.0 bar is introduced into a sealed container at 1024 K, the equilibrium pressure of HBr will be:

1. 11.20 bar

2. 5.56 bar

3. 7.30 bar

4. 9.95 bar

Subtopic:  Kp, Kc & Factors Affecting them |
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For the reaction, 2NOCl (g) $⇌$ 2NO (g) + Cl2 (g); Kp= 1.8 × 10–2 atm at 500 K.

The value of Kc for above mentioned reaction would be:

$1.$ $4.33$ $×$ ${10}^{-4}$ $\mathrm{mol}$ ${\mathrm{L}}^{-1}$
$2.$ $4.33$ $×$ ${10}^{4}$ $\mathrm{mol}$ ${\mathrm{L}}^{-1}$
$3.$ $1.65$ $×$ ${10}^{-5}$ $\mathrm{mol}$ ${\mathrm{L}}^{-1}$
$4.$ $2.39$ $×$ ${10}^{-3}$ $\mathrm{mol}$ ${\mathrm{L}}^{-1}$

Subtopic:  Kp, Kc & Factors Affecting them |
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For the following equilibrium, Kc= 6.3 × 1014 at 1000 K

$\mathrm{NO}\left(\mathrm{g}\right)$ $+$ ${\mathrm{O}}_{3}$ $\left(\mathrm{g}\right)$ $\to$ ${\mathrm{NO}}_{2}\left(\mathrm{g}\right)$ $+$ ${\mathrm{O}}_{2}$ $\left(\mathrm{g}\right)$ 

The value of Kc for the reverse reaction is:

$1.$ $2.33$ $×$ ${10}^{-16}$
$2.$ $1.59$ $×$ ${10}^{-15}$
$3.$ $2.67$ $×$ ${10}^{-13}$
$4.$ $4.47$ $×$ ${10}^{14}$

Subtopic:  Kp, Kc & Factors Affecting them |
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$$\mathrm{K}_{\mathrm{c}}=\frac{\left[\mathrm{NH}_3\right]^4\left[\mathrm{O}_2\right]^5}{[\mathrm{NO}]^4\left[\mathrm{H}_2 \mathrm{O}]^6\right.}$$
The balanced chemical equation corresponding to the above-mentioned expression is:

 1 $$4 \mathrm{NO}_{(\mathrm{g})}+6 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons 4 \mathrm{NH}_{3(\mathrm{g})}+5 \mathrm{O}_{2(\mathrm{g})}$$ 2 $$4 \mathrm{NH}_3(\mathrm{g})+5 \mathrm{O}_{2(\mathrm{g})} \rightleftharpoons 4 \mathrm{NO}_{(\mathrm{g})}+6 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})}$$ 3 $$\ 2 \mathrm{NO}_{(\mathrm{g})}+3 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons 4 \mathrm{NH}_{3(\mathrm{g})}+3 \mathrm{O}_{2(\mathrm{g})}$$ 4 $$\ \mathrm{NH}_{3(\mathrm{g})}+3 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons 2 \mathrm{NO}_{(\mathrm{g})}+3 \mathrm{O}_{2(\mathrm{g})}$$
Subtopic:  Kp, Kc & Factors Affecting them |
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One mole of H2O and one mole of CO are taken in a 10 L vessel and heated to 725 K. At equilibrium, 40% of water(by mass) reacts with CO according to the equation,

H2O (g) + CO (g)  $⇋$H2 (g) + CO2 (g)

The equilibrium constant for the above-mentioned reaction would be:

 1 0.66 2 0.35 3 0.44 4 0.82
Subtopic:  Kp, Kc & Factors Affecting them |
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