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For the Reaction CuS(s) + H2(g) ⇋\leftrightharpoons H2S(g) + Cu(s) Δ\Delta G ∘\circ

Question 82

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For the reaction CuS(s) + H2(g) ⇋\leftrightharpoons H2S(g) + Cu(s),
Δ\Delta G ∘\circ f (CuS) = -53.6 kJ/mol
Δ\Delta G ∘\circ f (H2S) = -33.6 kJ/mol
Δ\Delta H ∘\circ f (CuS) = -53.1 kJ/mol
Δ\Delta H ∘\circ f (H2S) = - 20.6 kJ/mol
This reaction proceeds spontaneously at 298 K and 1 atm pressure.

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