Why is e Cell 0 in a concentration cell?

Why is e Cell 0 in a concentration cell?

Concentration cells consist of anode and cathode compartments that are identical except for the concentrations of the reactant. Because ΔG = 0 at equilibrium, the measured potential of a concentration cell is zero at equilibrium (the concentrations are equal).

What happens when Ecell is 0?

If E°cell > 0, then the process is spontaneous (galvanic cell) If E°cell < 0, then the process is non-spontaneous (the voltage must be supplied, as in an electrolytic cell)

Under what condition is Delta G 0?

ΔG=ΔH−TΔS Where ΔH= change in enthalpy, ΔS is change in entropy and T is the temperature. ΔH=ΔU+PΔV where P is constant pressure, V is volume and U is internal energy. Hence the correct answer is A. If ΔG<0 then, the reaction is spontaneous in the direction it is written (backward or forward).

What are the applications of Nernst equation?

Even under non-standard conditions, the cell potentials of electrochemical cells can be determined with the help of the Nernst equation. The Nernst equation is often used to calculate the cell potential of an electrochemical cell at any given temperature, pressure, and reactant concentration.

What is Nernst distribution law and its application?

This statement is a Nernst Distribution Law – i.e. the law that determines the relative distribution of a component that is soluble in two liquids, these liquids being immiscible or miscible to a limited extent. This law is one of the laws applying to ideal dilute solutions. It was discovered by W. Nernst in 1890.

Which of the following is correct representation of Nernst equation?

E=Eo+0.0591nlog(Mn+).

What will happen if the back EMF?

If back emf of a dc motor vanishes suddenly, motor circuit will try to retain back emf by drawing more current from supply. As the back emf vanishes zero, the whole supply voltage appears across armature and heavy current flows.

How do you calculate EMF of a transformer?

(Volts). Therefore, RMS value of emf per turn = Form factor X average emf per turn. Therefore, RMS value of emf per turn = 1.11 x 4f Φm = 4.44f Φm. This is called the emf equation of transformer, which shows, emf / number of turns is same for both primary and secondary winding.