<u>Answer:</u> The EMF of the cell is -0.100 V and the reaction is non-spontaneous
<u>Explanation:</u>
The half reaction for the equation follows:
Oxidation half reaction:
Reduction half reaction:
<u>Net cell reaction:</u>
Oxidation reaction occurs at anode and reduction reaction occurs at cathode.
To calculate the of the reaction, we use the equation:
Putting values in above equation, we get:
- To calculate the EMF of the cell, we use the Nernst equation, which is:
where,
= electrode potential of the cell = ?
= standard electrode potential of the cell = -0.04 V
n = number of electrons exchanged = 2
Putting values in above equation, we get:
For the reaction to be spontaneous, the Gibbs free energy of the reaction must come out to be negative.
Relationship between standard Gibbs free energy and standard electrode potential follows:
For a reaction to be spontaneous, the standard electrode potential must be positive.
Hence, the EMF of the cell is -0.100 V and the reaction is non-spontaneous