Electrical resistance o It is denoted by the symbol‘ R’. o
The cell in which the following reactions occurs:
has E ø cell = 0.236 V at 298 K. Calculate the standard Gibbs energy and the equilibrium constant of the cell reaction.
Solution: By using the formula, ΔrG =-nFEcell =-2 X 96487 X 0.236
=- 45541.864 J mol-1 =- 45.54 KJ mol-1
Electrical resistance o It is denoted by the symbol‘ R’. o
It is measured in a unit called ohm( Ω) with the help of a Wheatstone bridge
o The electrical resistance is: 1. Directly proportional to its length, l 2. Inversely proportional to its area of cross section, A.