Chemistry

Chemistry

Problem

At 298 K the following pathway is proposed: A → B  ΔG∘=+12 kJ mol−1\Delta G^\circ = +12\,\text{kJ mol}^{-1} B → C  ΔG∘=−5 kJ mol−1\Delta G^\circ = -5\,\text{kJ mol}^{-1} C → D  ΔG∘=−14 kJ mol−1\Delta G^\circ = -14\,\text{kJ mol}^{-1} Calculate the standard Gibbs free energy change for the overall conversion A → D and state whether this value falls within the window −5 kJ mol−1-5\,\text{kJ mol}^{-1} to −20 kJ mol−1-20\,\text{kJ mol}^{-1}.

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