0

Guest

Courses New

What is the effect of external EMF in the function of Daniel cell??

What is the effect of external EMF in the function of Daniel cell??

Grade:12

3 Answers

Arun
25750 Points
4 years ago
If the cell is not set up reversibly, (for instance most common galvanic cells (aka 'batteries') are set up for no charging) there is no chemical reaction to make use of the voltage difference, and the amps will increase until the voltage resistance drop into and through the electrolyte in the cell matches the external applied voltage
Vikas TU
14149 Points
4 years ago
Dear student 
if Ew>E, then that also means that
RT/nFln[([Ox]w / [Red]w)] > [RT/nF] ln([Ox]/[Red])
Finally, you get that this situation implies an increase of Ox at the expense of Red, which is what you would expect from an electrolytic cell - the supply of electrical energy causes electrochemical reactions.
If you apply a potential that is below E, the only difference would be that Ox would decrease and Red would increase, but the overall treatment remains the same.
MANTHAN RAO
46 Points
3 years ago
  1. When no current is being drawn from a reversible cell, the potential difference across its terminals, or open circuit voltage (OCV), is known as the ELECTROMOTIVE FORCE or EMF of the cell.If the cell is not set up reversibly (For instance most common galvanic cells( A galvanic cell or voltaic cell, named after Luigi Galvani or Alessandro Volta, respectively, is an electrochemical cell that derives electrical energy from spontaneous redox reactions taking place within the cell.) are set up for no charging) there is no chemical reaction to make use of the voltage difference, and the amps will increase until the voltage resistance drop into and through the electrolyte in the cell matches the external applied voltage

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More