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# Nernst Equation help watch

1. Hi

basically as part of my A2 individual investigation project i am investigating how temperature effects the electrode potential of a cell, however i cant get my head around calculating the lnQ bit, any help would be really appreciated. thanks

^the equation
2. bump
3. (Original post by mrozzi)
Hi

basically as part of my A2 individual investigation project i am investigating how temperature effects the electrode potential of a cell, however i cant get my head around calculating the lnQ bit, any help would be really appreciated. thanks

^the equation
Rearrange the Nernst equation to give:

cell - Ecell = RT/nF x lnQ

You know the Eº
You find the Ecell at different temperatures
You know R, n and F (all constants for this cell) so you can directly calculate lnQ

Or if you plot nFE(diff)/R against T the plot should have a gradient lnQ
4. (Original post by charco)
Rearrange the Nernst equation to give:

cell - Ecell = RT/nF x lnQ

You know the Eº
You find the Ecell at different temperatures
You know R, n and F (all constants for this cell) so you can directly calculate lnQ

Or if you plot nFE(diff)/R against T the plot should have a gradient lnQ

thanks

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