Question

The EMF of a chemical cell is positive when free energy change of reaction

• A. >0
• B. <0
• C. =0
• D. no relationship of free energy change and e.m.f

Answer 1

Answer: (B)

$\Delta G=-nF{E}^0$
If Emf is positive (spontaneous reaction)
so $\Delta G=-ve$ i.e., less than zero