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Nernst Equation at 25 degrees?

Posted: Sat Feb 11, 2017 11:31 pm
by Franklin Kong 3D
On the bottom of Page 51 of the Course Reader, it displays the Nernst Equation. Then, on the next page, it says that at 25 degrees Celsius, it has 2.303RT/F = 0.059V, then E (cell) = E (standard) - 0.0592 / n Log (10) Q. Where did the "2.303" come from? And shouldn't it be lnQ as it is in the Nernst Equation instead of Log (10) Q?

Re: Nernst Equation at 25 degrees?  [ENDORSED]

Posted: Sat Feb 11, 2017 11:49 pm
by Yi Ying Chen 3N
The "2.303" comes from writing the Nernst equation in log base 10 rather than in ln:



It's sometimes more convenient to use log base 10, like when you're dealing with pH.