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Properties of Enthalpy

Which of the ...

Question

Which of the following reactions is favoured by increase of temperature ?

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g) + 92 K J

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179 k J + N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)

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2 S O_{2} (g) + O_{2} (g) ⇌ S O_{3} (g) + 189.5 K J

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H_{2} (g) + C l_{2} (g) ⇌ 2 H C l (g) + 184 K J

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Solution

The correct option is B $179 k J + N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)$
Explanation:

$N_{2} (g) + O_{2} (g) ⇌ 2 N O (g) - 179 K J$

Only this reaction is endothermic amongst the options, therefore, an increase in temperature would increase the amount of products formed.
Heat is produced in all other options, making them exothermic.

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Similar questions

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

Δ H = + 172.5

N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)

Δ H = - 91.8

N_{2} (g) + O_{2} (g) \to 2 N O (g)

Δ H = + 181

2 H_{2} O (g) \to 2 H_{2} (g) + O_{2} (g); Δ H = 484.6

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

N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

2 H I_{(g)} ⟶ H_{2 (g)} + I_{2 (g)}

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

2 N O_{(g)} ⟶ N_{2 (g)} + O_{2 (g)}

P C l_{5 (g)} ⟶ P C l_{3 (g)} + C l_{2 (g)}

\frac{K_{p}}{K_{c}}

300 K

N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)

N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)

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

[A t 300 K, R T = 24.62 d m^{3} a t m m o l^{- 1}]

N_{2} (g) + 3 H_{2} (g) ⇌ 2 {N H}_{3} (g) + H e a t

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