Consider the following gas-phase reaction of A 2 (shaded spheres)and B 2 (unshaded spheres):
A 2 (g)+ B 2 (g)⇌ 2 AB(g)ΔG ° = +25 kJ
-Which of the above reaction mixtures is ΔG of reaction = ΔG °?

Question

Consider the following gas-phase reaction of A 2 (shaded spheres)and B 2 (unshaded spheres):
A 2 (g)+ B 2 (g)⇌ 2 AB(g)ΔG ° = +25 kJ 
-Which of the above reaction mixtures is ΔG of reaction = ΔG °?

Quizplus · Accepted Answer

The Gibbs free energy change (ΔG) of a reaction equals the standard Gibbs free energy change (ΔG°) when the reaction mixture is at standard state conditions. This typically means that all reactants and products are at 1 M concentration for solutions or 1 atm pressure for gases, and the temperature is usually 25°C (298 K), though the temperature isn't a factor in the question's context. Choice C is correct because it implies a scenario where the reaction conditions match the standard state conditions, making ΔG equal to ΔG°.

Consider the Following Gas-Phase Reaction of A2 (Shaded Spheres)and B2

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