Saved Bookmarks
| 1. |
In the button cells widely used in watCHMes and other devices the following reaction takes place : `Zn(s)+Ag_(2)O(s)+H_(2)O(l) rarr Zn^(2+)(aq)+2Ag(s)+2OH^(c-)(aq)` Determine `Delta_(r)G^(c-)` and `E^(c-)` for the reaction. |
|
Answer» Correct Answer - `a. 1.104V` , `b. -2.13xx10^(5)J` `a.` `E_(cell)^(c-)=E_((Ag_(2)O|Ag)"red")^(c-)-E_((Zn^(2+)|Zn)"red")^(c-)` `=0.344-(-0.76)=1.104V` `b. Delta_(r)G^(c-)=-nFE^(c-).(n_(cell)=2)` `-2xx96500xx1.104J` `=-2.13xx10^(5)J` |
|