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Chemistry
The EMF of a chemical cell is positive when free energy change of reaction
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Q. The EMF of a chemical cell is positive when free energy change of reaction
Electrochemistry
A
>0
20%
B
<0
51%
C
=0
18%
D
no relationship of free energy change and e.m.f
11%
Solution:
$\Delta G = -nFE^0$
If Emf is positive (spontaneous reaction)
so $\Delta G = -ve$ i.e., less than zero