हिंदी
Karnataka Board PUCPUC Science 2nd PUC Class 12

Nernst Equation

Advertisements

Topics

Estimated time: 3 minutes
CBSE: Class 12

Key Points: Nernst Equation

The Nernst equation is used to calculate the electrode or cell potential under non-standard conditions.

\[E_{cell}=E_{cell}^\circ-\frac{RT}{nF}\ln Q\]

At 25°C, it becomes:

\[E_{cell}=E_{cell}^\circ-\frac{0.0591}{n}\log Q\]

Where E°cell is the standard cell potential, n is the number of electrons transferred, and Q is the reaction quotient.

The equation helps determine the direction and spontaneity of a reaction:

  • Ecell > 0 → spontaneous
  • Ecell = 0 → equilibrium (Q = K)

It also relates to Gibbs energy:

ΔG = −nFEcell

Thus, the Nernst equation is important for electrochemical calculations and equilibrium analysis.

Shaalaa.com | Nernst equation

Shaalaa.com


Next video


Shaalaa.com


Nernst equation [00:20:43]
S
Advertisements
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×