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Units for lnQ

Posted: Mon Mar 02, 2020 5:06 pm
by JamieVu_2C
For some problems where you have to calculate the cell potential using the Nernst equation, the solutions manual substitutes concentrations for aqueous species and partial pressures for gases into Q for lnQ. Don't you have to convert the units so that the species in Q are uniformly either in M or atm/bar? Or, can you leave the species in their standard states as given without conversion?

Re: Units for lnQ

Posted: Mon Mar 02, 2020 6:08 pm
by Jack Riley 4f
Q is a ratio so it has no units because they cancel out

Re: Units for lnQ

Posted: Mon Mar 02, 2020 6:20 pm
by Amy Pham 1D
As long as both the top and bottom components of the Q ratio have the same units, there is no need to convert as they will cancel out and fit into the logarithm as such.