Question

In the button cells widely used in watches and other devices the following reaction takes place:

Zn(s) + Ag₂O(s) + H₂O(l) → Zn²⁺(aq) + 2Ag(s) + 2OH⁻(aq)

Determine `triangle_rG^Theta` and `E^Theta` for the reaction.

 

Answer 1

`:. E^Theta = 1.104 V`

We know that,

`triangle_rG^Theta = -nFE^Theta`

= −2 × 96487 × 1.04

= −213043.296 J

= −213.04 kJ