Consider a reaction-N 2 g -3 H 2 g - 2 NH 3 g Given that- K eq -7 - 105- S NH 3-23-66 cal mol -1 K -1Both the values are at 300 K Find the value of - H NH 3- at 300 KTake ln 7-1-95A- -35-46 kcal mol -1B- -85-2 kcal mol -1C- -15-16 kcal mol -1D- -65-4 kcal mol -1

The correct option is C 15.16 kcal mol^ 1 nbsp; At temperature T, equilibrium constant is K_eq ,we know: nbsp; ln(K_eq) = Δ H^oRT+Δ S^oR R=2 cal mol^ ...

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Byju's Answer

Standard XII

Chemistry

Vant Hoff's Equation and Effect of Temperature on Equilibrium Constant

Consider a re...

Question

Consider a reaction:
$N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$
Given that ,
$K_{e q} = 7 \times 10^{5}$
$Δ S_{N H_{3}}^{\circ} = - 23.66 c a l m o l^{- 1} K^{- 1}$
Both the values are at 300K
Find the value of $Δ H_{N H_{3}}^{\circ}$ at 300 K
Take $l n (7) = 1.95$

- 15.16 k c a l m o l^{- 1}

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- 35.46 k c a l m o l^{- 1}

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- 85.2 k c a l m o l^{- 1}

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- 65.4 k c a l m o l^{- 1}

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Solution

The correct option is A $- 15.16 k c a l m o l^{- 1}$

At temperature $T$ , equilibrium constant is $K_{e q}$ ,we know:

$l n (K_{e q}) = - \frac{Δ H^{o}}{R T} + \frac{Δ S^{o}}{R}$
$R = 2 c a l m o l^{- 1} K^{- 1}$
Putting the given values
$l n (7 \times 10^{5}) = \frac{- Δ H^{\circ}}{2 \times 300} + \frac{(- 23.66)}{2} (1.95 + 5 \times 2.3) = \frac{- Δ H^{\circ}}{600} - 11.83 (13.45 + 11.83) \times 600 = - Δ H^{\circ} Δ H^{\circ} = - 15168 c a l m o l^{- 1} = - 15.16 k c a l m o l^{- 1}$

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Similar questions

Q. Consider a reaction:

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)

Given that ,

K_{e q} = 7 \times 10^{5}

Δ S_{N H_{3}}^{\circ} = - 23.66 c a l m o l^{- 1} K^{- 1}

Both the values are at 300K
Find the value of

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Take

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Consider a reaction: N2 (g)+3H2 (g)⇌2NH3 (g) Given that , Keq=7×105 ΔS∘NH3=−23.66 cal mol−1K−1 Both the values are at 300K Find the value of ΔH∘NH3 at 300 K Take ln(7)=1.95

Consider a reaction:
$N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$
Given that ,
$K_{e q} = 7 \times 10^{5}$
$Δ S_{N H_{3}}^{\circ} = - 23.66 c a l m o l^{- 1} K^{- 1}$
Both the values are at 300K
Find the value of $Δ H_{N H_{3}}^{\circ}$ at 300 K
Take $l n (7) = 1.95$