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

            Zn (s)+ Ag_{2}O(s)+H_{2}O(l)\rightarrow Zn^{2+}(aq)+2Ag(s)+2OH^{-}(aq)

         Determine \Delta_{r}G^{e} and E^{e} for the reaction.

Answers (1)

The given reaction is obtained from :- 

                          

So the Eocell  can be obtained directly.

                                                        E_{cell}^{\circ} = 0.76 - (-0.344) = 1.104\ V

Now for free energy calculation, we have :- 

                                          \Delta G_r^{\circ} = -nFE^{\circ}_{cell}

or                                                   = -2\times96487\times1.04

or                                                   = - 213043.29\ J

or                                                   = - 213.04\ KJ

Related Chapters

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Rank Booster NEET 2021

This course will help student to be better prepared and study in the right direction for NEET..

₹ 13999/- ₹ 9999/-
Buy Now
Knockout JEE Main April 2021 (Easy Installments)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Buy Now
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout NEET May 2022

An exhaustive E-learning program for the complete preparation of NEET..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions