First slide

Standard EMF of a cell

Question

For a spontaneous reaction the $ΔG$ , equilibrium constant (K) and E⁰_cell will be respectively

Moderate

A

–ve , >1, +ve
B

–ve, >1, –ve
C

–ve, <1, –ve
D

–ve, =1, –ve

Solution

${ΔG}^{o} = - RTlnK$
For a spontaneous process ΔG⁰ = -ve hence K > 1
${ΔG}^{o} = - {nFE}_{cell}^{o}$
When ${ΔG}^{o} = - ve$ ; $E_{cell}^{o} = + ve$
For a spontaneous process ${ΔG}^{o} = - ve, K > 1, E_{cell}^{o} = + ve$

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