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In the Button Cells Widely Used in Watches and Other Devices the Following Reaction Takes Place - Chemistry

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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.

 

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Solution

`:. E^Theta = 1.104 V`

We know that,

`triangle_rG^Theta = -nFE^Theta`

= −2 × 96487 × 1.04

= −213043.296 J

= −213.04 kJ

 

Concept: Batteries - Primary Batteries
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APPEARS IN

NCERT Class 12 Chemistry
Chapter 3 Electrochemistry
Q 6 | Page 91

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