In a closed vessel at 2 7 ∘ C the following partial pressures of gas are present : NO(g) = 0.1 bar; NO₂ (g) = 10⁻⁶ bar SO₂ (g) = 0.005 bar; SO₃ (g) = 0.05 bar Calculate the absolute Δ r G (in kJ/mol

Question

In a closed vessel at 2 7 ∘ C the following partial pressures of gas are present : NO(g) = 0.1 bar; NO₂ (g) = 10⁻⁶ bar SO₂ (g) = 0.005 bar; SO₃ (g) = 0.05 bar Calculate the absolute Δ r ​ G (in kJ/mol) for the reaction in this vessel: NO₂ (g) + SO₂ (g) ⇌ NO(g) + SO₃ (g)

TestHub · Accepted Answer

NO 2 ​ ( g ) + SO 2 ​ ( g ) ⇌ NO ( g ) + SO 3 ​ ( g ) Δ r ​ G ∘ Δ r ​ G ​ = Δ r ​ H ∘ − T Δ r ​ S ∘ = − 42 × 1000 + 300 × 22 = − 35400 J / mol = Δ r ​ G ∘ + RT ln Q P ​ = − 35400 + 3 25 ​ × 300 ln 1 0 − 6 × 0.005 0.1 × 0.05 ​ = − 900 J / mol ​

Chemistry - Thermodynamics - II Question with Solution | TestHub

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