Please enable JavaScript.
Coggle requires JavaScript to display documents.
Redox Processes (AHL) 19.1 (Standard Hydrogen Electrode (conditions (100…
Redox Processes (AHL) 19.1
Voltaic Cells
EMF
Maximum Voltage can be delivered
Energy supplied divide electric charge
Electric potential difference for zero current
Electron move from anode to cathode
Cell Potential
Potential difference between cathode and anode when cell is operating
less than maximum voltage that can be delivered by cell
depends
species involved
temperature
Standard cell Potential E
E
Data Booklet Page 23
Spontaneous
negative value oxidizes
positive value reduces
Positive means spontaneous
Standard Hydrogen Electrode
Diagram
Universal/Gas Electrode
Voltage of the reduction half equation under standard conditions measured relative to SHE
conditions
100 kPa
1.0 mol/dm3
298K
Gibbs Free Energy
∆G = -nFE
n = electrons transferred
F = 96500 C mol
∆G negative
Spontaneous