The cell reaction for a dry cell battery is Zn(s) + 2 MnO₂(s) + 2 NH₄⁺(aq) → 2 NH₃(aq) + Mn₂O₃(s) + Zn²⁺(aq) + H₂O(l) .
The standard cell potential for this cell is 1.56 V.What is the standard free energy change for this cell?

Question

Quizplus · Accepted Answer

The standard free energy change (ΔG°) can be calculated using the formula ΔG° = -nFE°, where n is the number of moles of electrons transferred (2 in this case), F is Faraday's constant (96485 C/mol), and E° is the standard cell potential (1.56 V). Calculating gives ΔG° = -2 * 96485 * 1.56 = -301 kJ.

The Cell Reaction for a Dry Cell Battery Is Zn(s)