Themes > Science > Chemistry > General Chemistry > Solution and Solubility > Solubility and Redox Reactions > Rate Laws - Cell Potential/Voltage > Voltage and Work

Another important formula is:

Voltage = work (w) in joules / charge (q) in coulombs

but because we are looking at the flow of electrons in the system the work (j) must be negative so, the formula that you would use is:

Voltage = - w / q

Charge is in the unit of coulombs. A faraday is the charge of 1 mole of electrons being transfered. The faraday is equal to 96,485 coulombs. Therefore, mathematically:

q = 96485 f

(Note: Teachers love to tell you the voltage and work and ask you for an answer in faradays. Make sure you read the question and use both formulas if necessary.)


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