E vs Eo

[Anuradha S 1F]

In the equation

E_cell = E^o - ln Q

what is the difference between E_cell and E^o?

[Rory Simpson 2F]

Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.

[Juliet Stephenson 4E]

E₀ represents E_cell at standard conditions.

[Anuradha S 1F]

Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.

Ah thank you sm!

[Nicholas Chin 1G]

In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

[Anuradha S 1F]

In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

Is E_o only ever 0 in a concentration cell or is there another situation in which E_o = 0 ?

[ValerieChavarin 4F]

Eº refers to standard conditions while E is not and therefore is affected by changes such as temperature, concentration etc.