Assuming ideal behaviour, the magnitude of log K for the following reaction at 25 ° C is x × 10 - 1 . The value of x is __________. (Integer answer) 3 HC ≡ CH ( g ) ⇌ C 6 H 6 ( l ) [Given: Δ f G ° HC

Question

Assuming ideal behaviour, the magnitude of $\log K$ for the following reaction at $25 ° C$ is $x \times 10^{- 1} .$ The value of $x$ is __________. (Integer answer)

$3 HC \equiv {CH}_{(g)} ⇌ C_{6} H_{6 (l)}$

[Given: $Δ_{f} G ° (HC \equiv CH) = - 2.04 \times 10^{5} J {mol}^{- 1}; Δ_{f} G ° (C_{6} H_{6}) = - 1.24 \times 10^{5} J {mol}^{- 1}; R = 8.314 J K^{- 1} {mol}^{- 1}$ ]

TestHub · Accepted Answer

3 HC ≡ CH g → C 6 H 6 ℓ : ΔG 0 = - RT ln K ΔG f 0 - 2 . 04 × 10 5 J mol - 1 . 24 × 10 5 J / mol ⇒ ΔG 0 = Σ ΔG f 0 P - Σ ΔG f 0 R ⇒ - RTℓnK = 1 × - 1 . 24 × 10 5 - - 3 × 2 . 04 × 10 5 ⇒ - 2 . 303 × R × T log K = 4 . 88 × 10 5 ⇒ log K = - 4 . 88 × 10 5 2 . 303 × R × T = - 488000 5705 . 848 = - 85 . 52 = 855 × 10 - 1 ⇒ x = 855

Chemistry - Thermodynamics - II Question with Solution | TestHub

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