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Le Chatelier's Principle for Del N Greater Than Zero

For a given r...

Question

For a given reaction:
$C (s) + O_{2} (g) \to C o (g) + H_{2} (g)$ at $25^{o} C$ $Δ H = 131 k J / m o l$
Given: $K_{p}$ = $9.36 \times 10^{- 17}$
Calculate the value of reaction constant at $700^{o} C$ .

A

0.915

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B

0.214

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C

0.583

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D

0.797

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Solution

The correct option is D $0.797$
As per van't hoff equation,
$l o g \frac{K_{2}}{K_{1}} = \frac{Δ H}{2.303 R} \times \frac{1}{T_{1}} - \frac{1}{T_{2}}$
Given: $K_{1}$ = $9.36 \times 10^{- 17}$
$Δ H = 131 k J / m o l e$ $T_{1} = 298 K$ $T_{2} = 973 K$
put up the values in equation, we get
$l o g \frac{K_{2}}{9.36 \times 10^{- 17}} = \frac{131}{2.303 R} \times \frac{1}{298} - \frac{1}{973}$
On solving,
$K_{2} = 0.797$

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Similar questions

Q. For a given reaction:

C (s) + O_{2} (g) \to C o (g) + H_{2} (g)

25^{o} C

Δ H = 131 k J / m o l

K_{p}

9.36 \times 10^{- 17}

Calculate the value of reaction constant at

700^{o} C

Δ H

k J

for the following reaction:

C (g) + O_{2} (g) \to C O_{2} (g)

H_{2} O (g) + C (g) \to C O (g) + H_{2} (g)

Δ H = + 131 k J

C O (g) + \frac{1}{2} O_{2} (g) \to {C O}_{2} (g)

Δ H = - 282 k J

H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (g)

Δ H = - 242 k J

Q. The enthalpies for the following reactions at

25^{o} C

\frac{1}{2} H_{2} (g) + \frac{1}{2} O_{2} (g) \to O H (g); Δ H = 10.06 k c a l

H_{2} (g) \to 2 H (g); Δ H = 104.18 k c a l

O_{2} (g) \to 2 O (g); Δ H = 118.32 k c a l

O - H

bond energy in the

O H

Q. Equilibrium constants for the following reaction at 1200 K are given.

2 H_{2} O (g) ⇋ 2 H_{2} (g) + O_{2} (g); K_{1} = 6.4 \times 10^{- 8}

2 C O_{2} (g) ⇋ 2 C O (g) + O_{2} (g); K_{2} = 1.6 \times 10^{- 6}

The equilibrium constant for the reaction

H_{2} (g) + C O_{2} (g) ⇋ C O (g) + H_{2} O (g)

at 1200 K will be:

Q. The equilibrium constants for the following reactions at

1400 K

2 H_{2} O (g) ⇌ 2 H_{2} (g) + O_{2} (g); K_{1} = 2.1 \times 10^{- 13}

2 {C O}_{2} (g) ⇌ 2 C O (g) + O_{2} (g); K_{2} = 1.4 \times 10^{- 12}

Then, the equilibrium constant

K

for the reaction,

H_{2} (g) + C O_{2} (g) ⇌ C O (g) + H_{2} O (g)

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Le Chatelier's Principle for Del N Greater Than Zero

Standard XIII Chemistry

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