# What is the Std. Gibbs free energy change and max. work obainable for reacion? Cu^2+ + Zn ---->Zn^2 + Cu Given- E for Cu^2/Cu = 0.34 V, E for Zn^2/Zn = -0.76 V, F = 96500 V

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I can find out Gibbs free energy from formula,

G=-EnF

But what is the maximum work obtainable?

I can find out Gibbs free energy from formula,

G=-EnF

But what is the maximum work obtainable?

##### 1 Answer

The maximum work available is

#### Explanation:

If 1 Coulomb of charge is moved through a potential difference of 1 Volt then 1 Joule of work is done.

The charge on a mole of electrons is given by

So:

If

If

This is the maximum amount of work available from the cell so:

The connection between this and the free energy change is:

So, under standard conditions:

To get