Free-energy change, ? G Free-energy change, ?G°, is related to cell potential, E

Question

Free-energy change, ?G

Free-energy change, ?G°, is related to cell potential, E°, by the equation ?G°= ?nFE° where n is the number of moles of electrons transferred and F=96,500C/(mol e-) is the Faraday constant. When E° is measured in volts, ?G° must be in joules since 1 J=1 C x V. 1) Calculate the standard free-energy change at 25°C for the following reaction: Mg(s)+Fe2+(aq) Right arrow Mg2+(aq)+Fe(s) 2)Calculate the standard cell potential at 25°C for the reaction X(s) + 2Y+(aq)? X2+(aq) + 2Y(s) where ?H° = -645kJ and ?S° = -121J/K .

Explanation / Answer

The half reactions involved of this redox reaction and their respective standard electrode potentials are:
(1) Mg

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.