4 mole H 2 O ( g ) , 2.5 mole H 2 , 2.5 mole CO ( g ) and 1 mole inert gas He are kept at a total pressure of 10 bar in a flask containing C (graphite) at temperature T . Calculate Δ G ( kJ ) of t

Question

4 mole H 2 ​ O ( g ) , 2.5 mole H 2 ​ , 2.5 mole CO ( g ) and 1 mole inert gas He are kept at a total pressure of 10 bar in a flask containing C (graphite) at temperature T . Calculate Δ G ( kJ ) of the following reaction at the above condition : C graphite + H₂O(g) → H₂(g) + CO(g) (Given: Δ G f , H 2 ​ O ( g ) ∘ ​ = − 230 k J / m o l , Δ G f , CO ( g ) ∘ ​ = − 130 k J / m o l , 2.303 RT = 10 k J , lo g ( 5/4 ) = 0.1 )

TestHub · Accepted Answer

C g r a p hi t e ​ + H 2 ​ O ( g ) → H 2 ​ ( g ) + CO ( g ) 4 2.5 2.5 Δ G r ∘ ​ Δ G ​ = − 130 − ( − 230 ) = 100 = Δ G ∘ + 2.303 RT lo g 10 ​ Q = 100 + 2.303 RT ln P H 2 ​ O ′ ​ P H 2 ​ ′ ​ × P CO ′ ​ ​ = 100 + 2.303 RT ln 10 4 ​ × 10 ( 10 2.5 ​ × 10 ) 2 ​ = 100 + 10 ln 4 6.25 ​ = 100 + 20 lo g 4 5 ​ = 102 kJ ​

Chemistry - Thermodynamics - II Question with Solution | TestHub

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