AP chemistry Unit 7 & 9 MCQ Question on Standard and non standard Gibbs free energy

Started by Chandrasekhar, April 17, 2026, 04:17:02 PM

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Chandrasekhar

April 17, 2026, 04:17:02 PM Last Edit: April 18, 2026, 10:10:50 AM by uma
mam, in this question I understand that delta G is greater than zero but why is it not at standard?Screenshot 2026-04-17 131446.png

uma

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April 18, 2026, 10:08:54 AM
In this question, we are discussing ΔGand not ΔG∘because the gases are mixed under non-standard conditions. Therefore, we must compare Qp with Kp. Since Q p>K p, the reaction mixture has excess products compared with equilibrium, so the reaction shifts toward the reactants. Hence, the forward reaction is non-spontaneous at that instant, and ΔG>0.
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